User manual JEFF ROWLAND MC6

MC-6 Multi-Channel Power Amplifier Owner's 1 Manual Introduction W elcome to the Jeff Rowland Design Group "family" and congratulations on your purchase of what is unquestionably one of the world's finest audio power amplifiers. W ith its combination of features such as variable multi-channel configuration, numerous function controls, interconnect possibilities, precision electronic circuitry, and accurately machined chassis components throughout, your MC-6 Multi-Channel Power Amplifier will offer you many years of musically satisfying enjoyment. P lease take a few minutes to read the remainder of this Owner's Manual before proceeding with the installation of the amplifier. A J eff Rowland Design Group, Inc. 2911 North Prospect Street Colorado Springs, CO 80907 T elephone: 719-473-1181 F ax: 719-633-4158 E -mail: jrdg@jeffrowland.com W eb: www.jeffrowland.com thorough understanding of the operational features will allow you to gain the maximum performance and ease of use for which this amplifier was designed. P lease note that your MC-6 Multi-Channel Power Amplifier serial number begins with the letters "MC6." This number is recorded below and is also located on the rear panel of the chassis. Please include this number with any correspondence regarding your MC-6 Multi-Channel Power Amplifier. I t has been my joy to create an audio component of enduring value that reflects a higher ideal of musical and artistic expression. It is my hope that these qualities will enrich your experience of ownership. Enjoy the music! Jeff Rowland President Jeff Rowland Design Group 2 Product Features · XLR input connectors for balanced (Differential ModeTM) system configuration. · · RCA input Connectors for unbalanced system configurations. User selectable switching between balanced and unbalanced connections. · Automatic temperature stabilizing circuitry maintains constant operating temperature. · DIN plug for remote turn-on and Standby operation on rear panel. · Multi-Channel configuration for mono, stereo, three-, four-, five-, or six-channel operation. · Stereo vertical bi- and tri-amplification capability within a single chassis. · Linkable inputs for channel selection and input configuration. · · · · · · Automatic bias adjustment maintains optimal bias setting regardless of source signal or loudspeaker load. Standby power mode reduces warm-up time. Fail-safe operation provided by user-resetable magnetic and thermal circuit breakers located on rear panel. Quiet, transient-free operation during power and function mode switching. Automatic input muting under anomalous input or output operating conditions. Fully balanced Differential ModeTM circuit topology implemented from input to output. Low resonance, structurally integrated chassis constructed of precision-machined 6061 aircraft grade aluminum. · 3 Contents MC-6 Multi-Channel Power Amplifier MC- Multi- AC Power Cable Spiked Coupling Supports Compliant Isolation Pads Speaker Terminal Hand Wrench Warranty Card 4 Initial Inspection, Unpacking, and Contents Initial Inspection If the shipping container, packing material, amplifier, or accessories are damaged or missing, notify your dealer and the shipper (if a claim is to be made) immediately. Note: Many shippers require notification and inspection within twenty-four hours of delivery to determine the nature of damages incurred. Your MC-6 Multi-Channel Power Amplifier has undergone extensive performance evaluations, listening tests, quality control inspections, and a minimum seventy-two hour burn-in period prior to shipment and should therefore be in perfect operating condition upon receipt. If the amplifier does not operate correctly, please notify your dealer immediately. We strongly suggest that you save all packing materials. If the amplifier is returned to your dealer or Jeff Rowland Design Group, the original packing materials must be used for shipment to avoid damage. Neither Jeff Rowland Design Group nor the shipper can be held responsible for damages incurred during transit if the original factory packing is not used. All factory returns require that Jeff Rowland Design Group issue a Return Authorization (RA) number prior to shipment. I nspect the shipping container for damage. To unpack the amplifier, stand the shipping case upright and unlock the top cover. Remove the top cover and open the gray liner bag to reveal the handles of the amplifier. Using the handles, the amplifier should be lifted straight out of the case and rested on its rear handles, standing upright. From this position, the MC-6 can be carefully and slowly lowered and set to rest on its feet and moved into its final resting place or installation point. Contents E nsure that all of the auxiliary components listed below are enclosed within the accessory box. Refer to the diagrams illustrated above and verify the components included. 1 2 3 One (1) AC Power Cable One set of four (4) Spiked Coupling Supports One set of four (4) Compliant Isolation Pads One (1) Speaker Terminal Hand Wrench (7/16 inch) One (1) Warranty Card (In some countries, warranties are provided by the respective importer.) Unpacking the Amplifier T he MC-6 is a large and heavy amplifier. Due caution should be taken when unpacking and installing the amplifier to avoid injury. The amplifier should be unpacked by at least two people, and there should be a portion of carpet or soft, padded cloth to stand the amplifier on when unpacking it from the shipping case. 4 5 5 Amplifier Maintenance and Cleaning Maintenance and Cleaning A ll Jeff Rowland Design Group products are designed to provide a lifetime of enjoyment and listening pleasure. The chassis is sealed to prevent dust from entering and the interior of the chassis should not need cleaning during the lifetime of the product. All internal circuitry is self-adjusting such that no adjustments or maintenance of any kind are necessary over the lifetime of the product. If the amplifier is ever in need of service, updating, or upgrading, it should only be returned to an authorized repair facility or technician for servicing. The MC-6 Multi-Channel Power Amplifier is finely constructed from pieces of solid aluminum. The front panel of the unit is cut in a unique process that uses a diamond tipped blade. This process was refined over many years to produce an artistic and attractive finish. Because the surface is not finished in the typical fashion of most audio and video equipment, there are a few rules that must be kept in mind when cleaning the equipment. · Please allow the front panel to cure for 6 months before attempting to clean it. This will prevent small scratches from marring the surface before the surface coating has had a chance to harden completely. The top cover, sides, and bottom cover can all be cleaned with a soft cotton cloth (such as an optical lens cleaning cloth or fine furniture polishing rag) dampened with plain water. Water should be applied directly to the cloth and not the chassis. If a mark has been left on the chassis, do not use any type of abrasive or chemical cleaner to remove the mark. A very mild plastic or glass cleaner that does not contain ammonia should be tried only as a last resort. 6 Please contact the factory before trying any type of cleanser on the chassis other than water to clean the unit. · The front panel of the unit should never be cleaned with anything other than a very soft cotton cloth and plain water or fine oilbased furniture polish. Because of the fine finish of the front panel, small scratches from the use of any other agent to clean the front panel will become very visible. If you have any questions about the care or cleaning of your MC-6 amplifier, please contact your dealer or the Jeff Rowland Design Group factory before attempting to clean the chassis. The use of a cleanser or abrasive to clean the chassis that has not been approved by the factory will almost certainly damage the finish and will not be covered under warranty. DC Protection System T he MC-6 Multi-Channel Power Amplifier is equipped with both magnetic and thermal circuit breakers for protection against excessive voltage input and DC signal current. However, since no protection circuitry or system can completely protect a product from every electrical hazard, certain precautions should be observed. In the event of severe voltage hazards such as lightning, or when the amplifier will not be used for extended periods of time such as when going on holiday, the amplifier should be unplugged from the AC mains to avoid potential damage to the internal circuitry. As lightning can also be carried through other components and interconnect cables, associated electronics should also be disconnected from the AC mains, antennae, or television cable if possible. · Amplifier Front Panel Function Control Amplifier Front Panel Front Panel Standby/Power Button 7 Amplifier Front Panel Function Control B efore attempting any system interconnection, please familiarize yourself with the front panel control of the MC-6 Multi-Channel Power Amplifier. The description below refers to the illustration above. FRONT PANEL STANDBY/POWER BUTTON: Press this button to operate the amplifier. Press again to place the amplifier in Standby mode. This button will illuminate when the amplifier is operational. When the button is not illuminated, all amplifier inputs are muted and internal circuitry reverts to power-saving (Standby) mode. Anomalous operating conditions will place the amplifier in Standby mode and will prevent the amplifier from being switched back on again until such a condition is eliminated. To avoid spurious noises and possible damage to the amplifier's internal circuitry, the amplifier should be switched to Standby mode when connecting or disconnecting any rear panel connections. Note: All ON/OFF power switching should be initiated ONLY with this button. The amplifier should not be disconnected from AC power without first placing the amplifier in Standby mode. 8 Amplifier Rear Panel Function Controls Amplifier Rear Panel 2 3 1 9 Amplifier Rear Panel Function Controls B efore attempting any system interconnection, please familiarize yourself with the rear panel controls of the MC-6 Multi-Channel Power Amplifier. The descriptions below refer to the illustrations above. 1 INPUT LINK SWITCHES FOR CHANNELS 1, 2, 3, 4, 5, AND 6: These switches allow the individual channels of the MC-6 to be linked in parallel to create single channels of great power and current capability. THE CORRECT SWITCHES MUST BE SWITCHED ON WHEN THE APPROPRIATE JUMPERS ARE PLACED ACROSS THE CORRESPONDING OUTPUT TERMINALS. 2 INPUT SELECT SWITCH FOR CHANNELS 1, 2, 3, 4, 5, AND 6: This switch selects either the unbalanced RCA inputs or the balanced XLR inputs. This switch can be switched while the amplifier is operational and playing music. Note: When the RCA position is selected, pin 2 of the XLR is shorted to pin 1 (signal ground). 3 REMOTE: A remote connector (5-Pin DIN) is provided on the rear IF ANY OUTPUT TERMINALS ARE JUMPERED TOGETHER, THE CORRESPONDING INPUTS MUST BE LINKED VIA THE INPUT LINK SWITCHES! FAILURE TO OBSERVE THIS PROCEDURE WHEN OPERATING THE AMPLIFIER WILL DAMAGE THE INTERNAL CIRCUITRY AND WILL VOID THE WARRANTY! BE SURE TO STRICTLY FOLLOW THE APPLICABLE CHANNEL CONFIGURATIONS AS SHOWN IN THE "SIGNAL CONNECTIONS CONTENTS DIRECTORY" ON PAGE 14 OF THIS MANUAL. + WARNING: panel for remotely switching the amplifier between operational and standby modes. The pin connections on this connector parallel the electrical contacts of the FRONT PANEL STANDBY/POWER button and lamp. Contact your dealer or the Jeff Rowland Design Group factory for further information about this feature. 10 Rear Panel Power Connections Amplifier Rear Panel 4 1 3 2 11 Installation L ocate the amplifier as close as possible to its final installation point. Allow access to the rear panel for making connections. The MC-6 Multi-Channel Power Amplifier is convection cooled, eliminating the need for fan or forced-air cooling. When operating, the chassis should have at least two (2) inches of air space around the heatsink areas. Multiple chassis can be stacked vertically, facilitating an upward flow of warm air currents throughout the vertical heatsink areas. This upward flow must not be blocked or recirculated around the chassis if proper cooling is to be maintained. Typical installations allow the amplifier to be rigidly coupled to a support structure or floor via the included spiked coupling supports. In carpeted installations, these supports provide excellent anchoring from the amplifier chassis to the rigid floor or sub-floor below. If there is concern about damage to the structure or floor's finish, a coin can be placed beneath each spiked coupling support. In installations where the resonant properties of the supporting structure are poor, the amplifier chassis can be loosely coupled to the supporting structure via the compliant isolation interface pads. This will help to attenuate the transfer of vibration or resonant energy from the support structure to the amplifier chassis. Rear Panel Power Connections Important: Please strictly follow the steps in order as outlined below Important: before operating your MC-6 Multi-Channel Power Amplifier. 1 Verify that the VOLTS AC input identified on the rear panel near the AC input socket is the same as the AC mains voltage in your area. If the voltage does not match, do not connect the amplifier to AC power and contact your dealer immediately. visible). 2 Verify that the AC MAINS CIRCUIT BREAKER is closed (green color 3 Install the AC Power Cable between the amplifier and your AC mains outlet. 4 Verify that the circuit breakers for channels 1, 2, 3, 4, 5, and 6 are closed (no white area visible on each breaker). Note: If the amplifier is to be moved to another location, always place the unit in Standby mode before disconnecting the AC power cable from the AC mains wall outlet. Never use the AC mains circuit breaker as a power switch to connect or disconnect the amplifier from AC mains power. 12 Use, Care, and Signal Connections T he Jeff Rowland Design Group MC-6 Power Amplifier has been designed with numerous protection circuits and to be able to operate at the highest level of performance in any normal operating situation. However, there are a few important use and care principles that must be kept in mind when operating the amplifier. · · · Do not expose the amplifier to rain, moisture, or excessively damp conditions. Do not disconnect the amplifier from AC mains without first placing the amplifier in Standby mode. The MC-6 Multi-Channel Power Amplifier must not be modified in any way, other than according to official service bulletins from Jeff Rowland Design Group. Otherwise, the factory warranty will be immediately voided. The MC-6 Multi-Channel Power Amplifier can be operated at a nominal 100, 115, 200, or 230 volts AC. For this reason, you should first assure that the amplifier has been wired for the correct AC input voltage before operation. As the MC-6 generates a significant amount of heat, it should not be placed in a cabinet or area where the heatsinks are not able to properly dissipate heat during operation. Please make sure adequate ventilation is provided. To clean the MC-6 Multi-Channel Power Amplifier, use a soft cloth moistened with plain water. Never apply water, dusting sprays, solvents, abrasives, or cleaning fluids directly to the chassis! When operating the MC-6, a properly grounded AC receptacle should be used. A potential shock hazard may result if the supplied 3-wire, grounded AC cord set ground terminal is defeated or lifted or the unit is connected to a 2-wire ungrounded AC outlet. Signal Connections T he MC-6 Multi-Channel Power Amplifier offers unprecedented channel configuration capability and compatibility with associated audio components. When connecting or disconnecting speaker or interconnect cables, it is always necessary to place the amplifier in Standby mode (FRONT PANEL STANDBY/POWER BUTTON not illuminated or OFF). Complete instructions for configuring and connecting the amplifier can be found in the next portion of this manual. Please also note that any changes or updates to the manual will be posted on the Jeff Rowland Design Group web site at http://www.jeffrowland.com. · + Warning: Both positive and negative outputs are electrically · active with respect to chassis and/or system ground potential! Therefore, this amplifier cannot be used in certain loudspeaker switching configurations, such as those used in retail demonstrations. Failure to avoid these precautions can result in damage to the amplifier and will void the warranty. · · 13 Signal Connections Contents Directory T he Jeff Rowland Design Group MC-6 Multi-Channel Power Amplifier features an innovative multi-channel adjustment topology that allows the amplifier to be configured for mono, stereo, three-, four-, five-, or even 6-channel operation. This flexibility means monoblock, two-channel stereo, bi-amplification, tri-amplification, and a number of home theater applications can be realized within a single amplifier chassis with a few easy adjustments. Within the amplifier there are two high-current amplifier sections and four standard amplifier sections. These amplifier sections can be linked to each other to configure the amplifier for different applications. The configuration procedure for the MC-6 Multi-Channel Amplifier is a quick and simple procedure, able to be performed within minutes with no additional tools or disassembly required. F or certain configurations, the outputs of multiple channels must be linked using short sections of Output Terminal Linking Cable. Linking Cables manufactured specifically for the MC-6 are available from Jeff Rowland Design group or can be made from the same basic materials as your selected loudspeaker cables. Please have your loudspeaker cable manufacturer contact the Jeff Rowland Design Group factory for proper instruction in the construction of these linking cables. T echnical Note: Linking (paralleling) multiple channels together is not similar to "bridging" and is an exclusive feature due to the unique circuitry of the MC-6. Linking channels together increases the maximum current available and decreases the electrical load of each linked channel. This yields improved electrical and sonic performance, especially under demanding conditions. For example, if channels 1 through 6 are linked together, the result is a single channel with a maximum output current capability equal to the sum of the current capability of channels 1 through 6. When linking channels, performance of the amplifier actually increases as a greater number of channels are linked together. Input and Output Connections Single Channel Monoblock Use Two-Channel, High Current Stereo Use Two-Channel, Vertical Bi-Amplification Use Two-Channel, Vertical Tri-Amplification Use Three-Channel Audio/Video Use Four-Channel, High Current Audio/Video Use Five-Channel Audio/Video Use Six-Channel Audio/Video Use Page 15 Page 17 Page 19 Page 21 Page 23 Page 25 Page 27 Page 29 14 Diagram for Single-Channel Monoblock Configuration Single- Left or Right Channel Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 Channel 3 Input CH 1 CH 2 Link Outputs of Channels 1 and 2, Channels 2 and 3, Channels 3 and 4, Channels 4 and 5, and Channels 5 and 6: Positive to Positive and Negative to Negative CH 3 Link 3 to 4 Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 Channel 6 Input CH 4 CH 5 CH 6 Full Range Loudspeaker 15 To Configure the Amplifier for Single-Channel Monoblock Use the Single1 Connect the left or right channel interconnect from your pre3 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 1 to CHANNEL 2, CHANNEL 2 to CHANNEL 3, CHANNEL 3 to CHANNEL 4, CHANNEL 4 to CHANNEL 5, and CHANNEL 5 to CHANNEL 6. amp or source component (depending on which channel of operation the amplifier is to be used for) to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. 4 Connect the corresponding left or right loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. 2 Flip the LINK INPUT 2 TO 1/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 2 TO 1. Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 3 TO 2. Flip the LINK INPUT 4 TO 3/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 4 TO 3. Flip the LINK INPUT 5 TO 4/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 5 TO 4. Flip the LINK INPUT 6 TO 5/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 6 TO 5. The signal connections are now complete. Please recheck your connections before operating the amplifier. 16 Diagram for Two-Channel Stereo, High Current Configuration Two- Left Channel Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 Channel 3 Input CH 1 Link Outputs of Channels 1 and 2 and Channels 2 and 3, Positive to Positive and Negative to Negative CH 2 CH 3 Full Range Loudspeaker Link 3 to 4 Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 Right Channel Preamp Output Channel 6 Input CH 4 Link Outputs of Channels 4 and 5 and Channels 5 and 6, Positive to Positive and Negative to Negative. CH 5 CH 6 Full Range Loudspeaker 17 To Configure the Amplifier for Two-Channel Stereo, High Current Use TwoHigh 1 Connect the left channel interconnect from your pre-amp or 4 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 1 to CHANNEL 2 and CHANNEL 2 to CHANNEL 3. 14), connect the output binding posts of CHANNEL 6 to CHANNEL 5 and CHANNEL 5 to CHANNEL 4. OUTPUT connector. OUTPUT connector. source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. towards LINK INPUT 2 TO 1. Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 3 TO 2. Flip the LINK INPUT 6 TO 5/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 6 TO 5. Flip the LINK INPUT 5 TO 4/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 5 TO 4. 5 Using the output terminal linking cables of your choice (see page 2 Connect the right channel interconnect from your pre-amp or 6 Connect your left loudspeaker cable to the Channel 1 SPEAKER 7 Connect your right loudspeaker cable to the Channel 6 SPEAKER 3 Flip the LINK INPUT 2 TO 1/UNLINK (NORMAL) switch "ON", or up The signal connections are now complete. Please recheck your connections before operating the amplifier. 18 Diagram for Two-Channel Stereo, Vertical Bi-Amplification Use Diagram TwoBi- Left Channel Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 Channel 3 Input CH 1 Woofer Bi-Wireable Loudspeaker CH 2 Tweeter CH 3 Link 3 to 4 Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 Right Channel Preamp Output Channel 6 Input CH 4 CH 5 Tweeter Bi-Wireable Loudspeaker CH 6 Woofer 19 To Configure the Amplifier for Two-Channel Stereo, Vertical Bi-Amplification Use TwoBiUse 1 Connect the left channel interconnect from your pre-amp or source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. 4 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 3 to CHANNEL 2. 14), connect the output binding posts of CHANNEL 5 to CHANNEL 4. 5 Using the output terminal linking cables of your choice (see page 2 Connect the right channel interconnect from your pre-amp or source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. 6 Connect your left woofer loudspeaker cable to the Channel 1 SPEAKER OUTPUT connector. Connect your left tweeter loudspeaker cable to the Channel 2 SPEAKER OUTPUT connector. 3 Flip the LINK INPUT 2 TO 1/UNLINK (NORMAL) switch "ON", or up 7 Connect your right tweeter loudspeaker cable to the Channel 5 towards LINK INPUT 2 TO 1. Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 3 TO 2. Flip the LINK INPUT 6 TO 5/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 6 TO 5. Flip the LINK INPUT 5 TO 4/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 5 TO 4. SPEAKER OUTPUT connectors. Connect your right woofer loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. Please recheck your The signal connections are now complete. connections before operating the amplifier. 20 Diagram for Two-Channel Stereo, Vertical Tri-Amplification Configuration TwoTri- Left Channel Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 Channel 3 Input CH 1 Woofer CH 2 Midrange Tri-Wireable Loudspeaker CH 3 Tweeter Link 3 to 4 Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 Right Channel Preamp Output Channel 6 Input CH 4 Tweeter CH 5 Midrange Tri-Wireable Loudspeaker CH 6 Woofer 21 To Configure the Amplifier for Two-Channel Stereo, Vertical Tri-Amplification Use TwoTri1 Connect the left channel interconnect from your pre-amp or 5 Connect your left woofer loudspeaker cable to the Channel 1 source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. SPEAKER OUTPUT connector. Connect your left midrange loudspeaker cable to the Channel 2 SPEAKER OUTPUT connector. Connect your left tweeter loudspeaker cable to the Channel 3 SPEAKER OUTPUT connector. 2 Connect the right channel interconnect from your pre-amp or source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. 6 Connect your right woofer loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. Connect your left midrange loudspeaker cable to the Channel 5 SPEAKER OUTPUT connector. Connect your left tweeter loudspeaker cable to the Channel 4 SPEAKER OUTPUT connector. Please recheck your 3 Flip the LINK INPUT 2 TO 1/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 2 TO 1. Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 3 TO 2. The signal connections are now complete. connections before operating the amplifier. 4 Flip the LINK INPUT 6 TO 5/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 6 TO 5. Flip the LINK INPUT 5 TO 4/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 5 TO 4. 22 Diagram for Three-Channel Configuration Three- Left Front Channel Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 CH 1 Full Range Loudspeaker Link Outputs of Channels 1 and 2, Positive to Positive and Negative to Negative CH 2 Center Channel Preamp Output Channel 3 Input CH 3 Center Channel Loudspeaker Link 3 to 4 Link Outputs of Channels 3 and 4, Positive to Positive and Negative to Negative Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 Right Front Channel Preamp Output Channel 6 Input CH 4 CH 5 Full Range Loudspeaker Link Outputs of Channels 5 and 6, Positive to Positive and Negative to Negative CH 6 23 To Configure the Amplifier for Three Channel Use 1. 1 Connect the left front channel interconnect from your pre-amp or source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. or source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 3 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 3 BAL/UNBAL switch towards the connector that is being used. towards LINK INPUT 6 TO 5. Flip the LINK INPUT 4 TO 3/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 4 TO 3. Flip the LINK INPUT 2 TO 1/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 2 TO 1. 5 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 1 to CHANNEL 2. 6 Using the output terminal linking cables of your choice (see page 2 Connect the right front channel interconnect from your pre-amp 14), connect the output binding posts of CHANNEL 3 to CHANNEL 4. 14), connect the output binding posts of CHANNEL 5 to CHANNEL 6. SPEAKER OUTPUT connector. 7 Using the output terminal linking cables of your choice (see page 3 Connect the center channel interconnect from your pre-amp or 8 Connect your left front loudspeaker cable to the Channel 1 9 Connect your right front loudspeaker cable to the Channel 5 SPEAKER OUTPUT connector. 4 Flip the LINK INPUT 6 TO 5/UNLINK (NORMAL) switch "ON", or up 10 Connect your center channel loudspeaker cable to the Channel 3 SPEAKER OUTPUT connector. The signal connections are now complete. connections before operating the amplifier. Please recheck your 24 Diagram for Four-Channel Configuration Four- Left Channel 1 Preamp Output Channel 1 Input Link 1 to 2 Channel 2 Input Link 2 to 3 CH 1 Full Range Loudspeaker CH 2 Link Outputs of Channels 2 and 3, Positive to Positive and Negative to Negative Left Channel 2 Preamp Output Channel 3 Input CH 3 Full Range Loudspeaker Link 3 to 4 Right Channel 1 Preamp Output Channel 4 Input Link 4 to 5 Channel 5 Input Link 5 to 6 CH 4 Link Outputs of Channels 4 and 5, Positive to Positive and Negative to Negative CH 5 Full Range Loudspeaker Right Channel 2 Preamp Output Channel 6 Input CH 6 Full Range Loudspeaker 25 To Configure the Amplifier for Four-Channel Use Four1 Connect the left channel 1 interconnect from your pre-amp or 5 Flip the LINK INPUT 5 TO 4/UNLINK (NORMAL) switch "ON", or up source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 4 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 4 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 3 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 3 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. towards LINK INPUT 5 TO 4. Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up towards LINK INPUT 3 TO 2. 14), connect the output binding posts of CHANNEL 2 to CHANNEL 3. 6 Using the output terminal linking cables of your choice (see page 2 Connect the right channel 1 interconnect from your pre-amp or 7 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 4 to CHANNEL 5. SPEAKER OUTPUT connector. 3 Connect the left channel 2 interconnect from your pre-amp or 8 Connect your left channel 1 loudspeaker cable to the Channel 1 9 Connect your right channel 1 loudspeaker cable to the Channel 5 SPEAKER OUTPUT connector. SPEAKER OUTPUT connector. 4 Connect the right channel 2 interconnect from your pre-amp or 10 Connect your left channel 2 loudspeaker cable to the Channel 3 11 Connect your right channel 2 loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. The signal connections are now complete. Please recheck your connections before operating the amplifier. 26 Diagram for Five-Channel Configuration Five- Left Front Channel Preamp Output Channel 1 Input Link 1 to 2 CH 1 Left Front Full Range Loudspeaker Link Outputs of Channels 2 and 3, Positive to Positive and Negative to Negative Center Channel Preamp Output Channel 2 Input Link 2 to 3 Channel 3 Input CH 2 CH 3 Center Channel Loudspeaker Link 3 to 4 Left Rear Channel Preamp Output Channel 4 Input Link 4 to 5 CH 4 Left Rear Loudspeaker Right Rear Channel Preamp Output Channel 5 Input Link 5 to 6 CH 5 Right Rear Loudspeaker Right Front Channel Preamp Output Channel 6 Input CH 6 Right Front Full Range Loudspeaker 27 To Configure the Amplifier for Five-Channel Use Five1 Connect the left front channel interconnect from your pre-amp or source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 2 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 2 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 4 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 4 BAL/UNBAL switch towards the connector that is being used. 5 Connect the right front channel interconnect from your pre-amp or source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. towards LINK INPUT 3 TO 2. 2 Connect the center channel interconnect from your pre-amp or 6 Flip the LINK INPUT 3 TO 2/UNLINK (NORMAL) switch "ON", or up 7 Using the output terminal linking cables of your choice (see page 14), connect the output binding posts of CHANNEL 2 to CHANNEL 3. SPEAKER OUTPUT connector. 3 Connect the left rear channel interconnect from your pre-amp or 8 Connect your left front loudspeaker cable to the Channel 1 9 Connect your center channel loudspeaker cable to the Channel 3 SPEAKER OUTPUT connector. 4 Connect the right rear channel interconnect from your pre-amp or source component to the CHANNEL 5 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 5 BAL/UNBAL switch towards the connector that is being used. 10 Connect your left rear loudspeaker cable to the Channel 4 SPEAKER OUTPUT connector. 11 Connect your right rear loudspeaker cable to the Channel 5 SPEAKER OUTPUT connector. 12 Connect your right front loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. The signal connections are now complete. connections before operating the amplifier. Please recheck your 28 Diagram for Six-Channel Configuration Six- Channel Left Front Channel Preamp Output Channel 1 Input Link 1 to 2 CH 1 Left Front Full Range Loudspeaker Left Rear Channel Preamp Output Channel 2 Input Link 2 to 3 CH 2 Left Rear Loudspeaker Center Channel Preamp Output Channel 3 Input CH 3 Center Channel Loudspeaker Link 3 to 4 Subwoofer Preamp Output Channel 4 Input Link 4 to 5 CH 4 Passive Subwoofer Right Rear Channel Preamp Output Channel 5 Input Link 5 to 6 CH 5 Right Rear Loudspeaker Right Front Channel Preamp Output Channel 6 Input CH 6 Right Front Full Range Loudspeaker 29 To Configure the Amplifier for Six-Channel Use Six1. 1 Connect the left front channel interconnect from your pre-amp or source component to the CHANNEL 1 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 1 BAL/UNBAL switch towards the connector that is being used. or source component to the CHANNEL 6 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 6 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 2 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 2 BAL/UNBAL switch towards the connector that is being used. 6 Connect the passive subwoofer channel interconnect from your 2 Connect the right front channel interconnect from your pre-amp pre-amp or source component to the CHANNEL 4 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 4 BAL/UNBAL switch towards the connector that is being used. or down towards the UNLINK (NORMAL) position. 7 Verify that all of the LINK INPUT switches are in the "OFF" position, 8 Connect your left front loudspeaker cable to the Channel 1 SPEAKER OUTPUT connector. 3 Connect the left rear channel interconnect from your pre-amp or 9 Connect your right front loudspeaker cable to the Channel 6 SPEAKER OUTPUT connector. SPEAKER OUTPUT connector. SPEAKER OUTPUT connector. 10 Connect your left rear loudspeaker cable to the Channel 2 11 Connect your right rear loudspeaker cable to the Channel 5 12 Connect your center channel loudspeaker cable to the Channel 3 SPEAKER OUTPUT connector. 4 Connect the right rear channel interconnect from your pre-amp or source component to the CHANNEL 5 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 5 BAL/UNBAL switch towards the connector that is being used. source component to the CHANNEL 3 balanced XLR or unbalanced RCA input connector. Select the correct balanced or unbalanced input connector by flipping the Channel 3 BAL/UNBAL switch towards the connector that is being used. 5 Connect the center channel interconnect from your pre-amp or 13 Connect your passive subwoofer loudspeaker cable to the Channel 4 SPEAKER OUTPUT connector. The signal connections are now complete. Please recheck your connections before operating the amplifier. 30 MC-6 Multi-Channel Power Amplifier Specifications MC- MultiPower Output per Channel: Output Current: 60 amps peak, Channels 1 and 6 30 amps peak, Channels 2 ­ 5 Linked channels are cumulative 40 Watts Standby, 200 Watts Idle, 1200 Watts Maximum User Selectable, 6 x Balanced XLR 6 x Unbalanced RCA Six Pairs Five-Way Binding Posts 17.5" W x 22" D x 11.4" H 44.5 cm W x 56 cm D x 28.5 cm H 124 lbs. 56 kg 24" W x 22" D x 13" H 61cm W x 56cm D x 33cm H 164 lbs. 75 kg Continuous RMS watts @8 ohms @4 ohms Monoblock: Two-Channel: Six-Channel: 330 watts 250 watts 150 watts 600 watts 400 watts 250 watts 0.1 Hz to 160 kHz, -3 dB 25 volts/microsecond Less than 0.01% at Rated Power >60, Channels 1 and 6 >40, Channels 2 through 5 26 dB, 141 mV 36k ohms per Channel Power Bandwidth: Slew Rate: THD + Noise: Damping Factor: Gain (1 watt, 8 ohms): Input Impedance: Impedance: Common Mode Rejection Ratio: Absolute Phase: Power Consumption: Consumption: Inputs: Outputs: Amplifier Dimensions: Amplifier Weight: Shipping Dimensions: Shipping Weight: >75 dB, 20 ­ 20 kHz Phase-Inverted 31 Basic Troubleshooting A summary of fault conditions and their causes and remedies are listed below. The MC-6 Multi-Channel Power Amplifier can produce high power levels that, without well-designed protection circuitry, could damage loudspeakers. Therefore, most fault conditions will result in the MC-6 reverting to Standby Mode. Condition: Front panel STANDBY/POWER BUTTON does not illuminate after pressing, amplifier operates normally: Front panel STANDBY/POWER BUTTON lamp does not illuminate after pressing and amplifier does not operate normally. Front panel STANDBY/POWER BUTTON reverts to Standby Mode during listening but can be returned to normal operation: Cause: Light bulb defective. Remedy: Remove STNADBY/POWER BUTTON from front panel and replace bulb located under button. Use replacement bulb kit and instructions supplied by your dealer. Review Installation/Rear Panel Power Connections section of Owner's Manual. Contact your dealer immediately. Repair or replace source component. Identify and correct abnormal conditions such as low frequency rumble and/or acoustic feedback caused by phono playback (if applicable). Reduce volume slightly or use higher efficiency loudspeakers. Consult your dealer immediately to have the amplifier reconfigured for the proper AC mains voltage. Contact your dealer immediately. Use balanced system configuration if possible. Inspect interconnect cables for poor connection or termination. between Incorrect power connections or circuit breaker positions on rear panel of amplifier. Abnormal Operation of the MC-6 internal circuitry. Excessive sub-sonic or DC signals produced by source components. Severe clipping of amplifier circuitry. AC MAINS CIRCUIT BREAKER switches OFF or will not remain ON: AC mains voltage too high for amplifier. Abnormal operation of amplifier internal circuitry. 50/60 Hz buzz noise in loudspeakers: Ground loop condition components in system. created 32 Additional Information I f you have any additional questions regarding the installation or operation of the MC-6 Multi-Channel Power Amplifier, please contact your authorized Jeff Rowland Design Group dealer or check the Jeff Rowland Design Group web site at http://www.jeffrowland.com. 33 Post Office Box 7231 Colorado Springs, Colorado 80933 USA 34