B & K Components Ltd. P/N 12691 B&K Components, Ltd., 2100 Old Union Road, Buffalo, New York 14227 Safety Precautions Purpose and function Design and construction Features Rear panel view Rear panel description Control muting Level controls Outputs Inputs System installation Making the connection Troubleshooting Care and cleaning Specifications Warranty Manual and Power cord Page 2 Page 3 Page 3 Page 3 Page 4 Page 4 - 5 Page 5 - 6 Page 6 Page 7 Page 7 - 8 Page 9 Page 9 - 10 Page 11 Page 11 Page 12 page 13 Page 1 WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE. The lightning flash with arrowhead, within an equilateral triangle, is intended to alert the user of the presence of uninsulated "dangerous voltage" within the product's enclosure that may be sufficient magnitude to constitute a risk of electric shock to you. The exclamation point within an equilateral triangle is intended to alert the user of the presence of important operating and maintenance (servicing) instructions in the literature accompanying the unit. Observance of polarity is essential. Double-check connections before turning the amplifier on. The amplifier can be damaged if polarities are incorrect. Damage can occur to your speakers if the power rating* of each individual driver is exceeded by the amplifier. Ensure that all the drivers in your speaker system are capable of handling not only the power being delivered by the amplifier, but the energy that is likely to be generated during strong passages. Turn amplifier `off' when plugging in or unplugging input and speaker cables!!! The ST3030 series II is equipped with raised feet so that continuous ventilation can be maintained. They help to maintain acoustic feedback into the amplifier at a minimum. They also provide a measure of protection against scratching any surface the unit might be resting on. Do not stack anything on top of the amplifier (preamplifier, processor, source...etc.). Leave at least 2-3 inches clearance from the top of the amplifier to the next shelf, component, etc., to ensure proper ventilation. * If you are at all unsure of what the speaker `ratings' are, contact your dealer. Page 2 The ST3030 series II is a compact, very efficient, two channel power amplifier. It is designed to be used in all types of audio or audio/video systems. The ST3030 series II utilizes high quality electronic circuitry to achieve an environment wherein a detailed, transparent, and highly musical sound can be realized. The high quality parts complement include state-of-the-art solid state devices, 1% metal film resistors, computer grade electrolytic power supply capacitors, and a high capacity toroidal transformer. The ST3030 series II operates class A predriver and AB high current MOSFET power output stages. It is capable of reproducing the most demanding audio signals at rated power levels. - Efficient high current transformer for improved dynamics. - More accurate and three dimensional reproduction of source material. - Improves low level detail for smoother, more musical sound. - For efficient and linear power delivery. - Provides short term protection from accidental shorting of output devices and protection from thermal overload. - Improve connections for better sound and minimized signal loss and degradation. - Low noise resistors for better sound and a greater degree of repeatability. - Ability to reproduce demanding recordings. - Large capacity computer grade electrolytic capacitors for extended low frequency control and improved dynamics. Page 3 1. AC fuse holder 2. AC Input receptacle 3. Speaker outputs 4. Balanced inputs 5. RCA inputs (unbalanced) 6. Level controls ** 7. Amplifier control muting input/output 1. AC fuse holder - Holds the AC Line fuse. This fuse is an 8 Amp / 250 Volt Slow Blow fuse. Replace with same type and value fuse only. 2. AC Input receptacle - For attaching the supplied AC power cord to the amplifier. 3. Speaker outputs For connecting the speakers to the amplifier. Explained further on page 7. Page 4 4. Balanced inputs - For connecting balanced signal patch cables (XLR). Explained further on page 8. For connecting signal patch cables (interconnects) from the preamplifier to the amplifier to pass signal. For adjusting the input level to the amplifier. Explained further on page 6. 5. RCA inputs - 6. Level controls - 7. Amplifier control muting input/output To provide remote switching of mute on/off of the amplifier. Explained further below. A control is provided on each ST3030 series II amplifier to allow remote switching of mute on/off. The preamplifier's control output, such as is provided with B&K series preamplifiers, can be utilized to provide a control signal to the ST3030 series II. If more than one amplifier is being controlled, the control signal can be extended to include each successive unit by simply running an RCA type audio cable from the CTRL OUT connector of the first amplifier to the CTRL IN connector of the next unit (commonly referred to as `daisy chaining'). An example of how to connect two amplifiers is illustrated in figure B. If a source other than a B&K series preamplifier is used to control multiple amplifiers, only the control output voltage from the source is critical. It must be within the range, as indicated on the rear panel, 5-24 volts DC is required. The amplifier will provide each successive amplifier with a control voltage of 12 volts DC for reliable operation. The amplifiers control output may be used as a source of 12 VDC @ 125 mA for other user applications as well. Page 5 If the control function is desired, each unit in the system must remain connected at all times and the control must be enabled. To enable the control function, the CTRL ENABLE button must be out for each controllable amplifier in the system. For more information on the amplifiers output status under various control conditions, refer to the table below. @ CTRL IN Signal Signal No Signal No Signal Button position OUT IN OUT IN Output status Sound Sound Mute Sound @ CTRL OUT Signal Signal No Signal Signal The level controls are an option that can be added to the amplifier. If your amplifier has this option, the balanced inputs are not present. There are two level controls on the back of the amplifier. One level control for each channel. When using the level controls, first start with them turned all the way up (clockwise). Then adjust them according to your system requirements to match the sound level coming from each speaker. Page 6 Five way binding posts are provided. One pair for each channel. They are designed to accept a banana-type plug or spade lug connector (shown below) and are color coded for easy identification. The red (+) post should always be connected to the speakers (+) jack. The black (-) post should always be connected to the speakers (-) jack. Spade connector Banana jack Here is a typical amplifier setup: Unbalanced - RCA type connectors accept line input from the preamplifier's unbalanced output connectors. There are two input connectors, one for each channel, that may be used to connect the amplifier to the preamplifier. RCA cable connector - Operation - For unbalanced operation, ensure the balanced switch between the balanced inputs on the rear of the amplifier is in the `off' (out) position. If the amplifier does not have balanced inputs then it is always in unbalanced mode. Page 7 Balanced - XLR type connectors accept line input from the preamplifier's balanced output connectors. There are two input connectors, one for each channel, that may be used to connect the amplifier to the preamplifier. Balanced cable connector - Operation - For balanced operation, ensure the balanced switch between the balanced inputs on the rear of the amplifier is in the `on' (in) position. Here is a typical input setup: Page 8 There will most likely be a number of cables involved in the installation of your home entertainment system. Pre-planning is essential in order to maximize system efficiency. We recommend the following as a means of helping you reach that goal: Make a diagram of your proposed system by laying out the relative location of each component in the system. Then lay out the proposed cable runs between them. Number each cable and record its length on the diagram for future reference. Cable runs are critical in that they must be kept away from sources of power radiation (amplifiers, power cords, heaters, etc...). For the sake of safety, they should also be kept out of traffic areas. The process of optimizing the system will include the type of cable, the length of the run, and the obstructions it must deal with along its run. Your dealer can advise you on the products available and their relative merits. If building custom length audio cables is not your strength, your dealer should be able to help you with that as well. When possible, use a separate AC power line for the amplifier, one that is not shared by any other component in the system of any other house hold component. Before doing anything, ensure that the power switch on the amplifier's front panel is in the `off' position. Again, it is recommended that you locate a separate AC power outlet for the amplifier, one that is shared by any other audio component in the system or any other house hold component. This will eliminate the possibility of the amplifier `modulating' the power being supplied to the component and compromising the signal originating from that component. Locate the AC power cord provided with the amplifier and plug it into the power input receptacle in the rear panel. Connect the audio cables from your preamplifier's output to the corresponding input connector on the amplifier. Page 9 Connect the wires from your speakers to the appropriate output on the amplifier. It is absolutely essential that you observe correct polarity in these connections. Double check all connections. Plug the amplifier's power cord into the AC power source. Turn the amplifier's power switch `on'. The panel light should be illuminated. Leave the preamplifier turned off. Before proceeding to the next step turn the amplifier off and wait 30 seconds for the amplifier to discharge. Both the preamplifier and amplifier should be off. Connect a playback unit (CD, VLD, Tuner, etc...) to the preamplifier. Turn the volume on the preamplifier to minimum. Turn on the preamplifier, then the amplifier (in that order). Set source on the preamplifier to the playback unit you've just connected. Turn volume up slowly and music should be heard from all channels. If this is not the case, double check your installation. Should you encounter any problems that cannot be traced to the source or the material being played, consult the "TROUBLESHOOTING" section on page 11. Page 10 PROBLEM No sound (`on' LED not illuminated) 1. 2. 3. 4. No sound on some or all selected channels (`on' LED illuminated) 1. 2. 3. 4. Sound lacks direction, bass weak 1. POSSIBLE CAUSE Power cord not plugged in. Power off at AC source. AC power inlet fuse blown or faulty. Control switch in the wrong position. Speaker leads loose or faulty. Line stage to amp. cables loose. or faulty. Source to line stage cables loose or faulty. Line stage or source not correctly selected. Speakers connected out of phase. POSSIBLE SOLUTION 1. 2. 3. 4. 1. 2. 3. 4. 1. Reconnect power cord. Check AC switch or fuse. Check for shorts or overloading. Place control switch in proper position. (Page 5) Tighten, repair, or replace cable. Tighten, repair or replace cable. Tighten, repair or replace cable. Check all switch settings. Check connections making sure that cables are connected (+) to (+) and (-) to (-). Check all connectors and repair as necessary. Put balanced switch in correct position. Replace blown rail fuse inside amplifier. Loud hum or buzz on one or more channels Low output from amplifier 1. 1. Poor ground connection in interconnect cables. Balanced switch in balanced mode when using unbalanced inputs. Blown rail fuse. 1. 1. Channel sounds distorted and low in output 1. 1. ** Note: If unit continues to blow power inlet fuses, have it serviced. Under normal use, the amplifier will not require any special care. Over time you may wish to clean the exterior of the unit by wiping it with a damp cloth to remove any dirt or dust that accumulates on it. Do not let any liquid enter the amplifier thru the vents in the top cover. You may clean the connectors on the rear panel with isopropyl alcohol annually. Page 11 Power rating: 8 ohms 4 ohms Frequency response Input sensitivity THD (S+N) Input impedance Damping factor Current (peak to peak) Slew rate Dynamic headroom S/N (A-weighted) Voltage gain Line voltage Dimensions (O.A.) Weight Power consumption 200 watts @ 1 kHz 300 watts @ 1 kHz 5 Hz - 45 kHz 1.4 Volts 0.09 % @ 1 kHz 33.2 k ohms 180 50 Amps 14 V / )sec 1.1 dB 95 dB 28 120/ ...