User manual GENELEC 8020A

8020A Operating Manual Genelec 8020A Active Monitoring System General description The bi-amplified GENELEC 8020A is an extremely compact two way active monitoring loudspeaker designed for near field monitoring, mobile vans, broadcast and TV control rooms, surround sound systems, home studios, multimedia applications and also for use with computer soundcards. As an active loudspeaker, it contains drivers, power amplifiers, active crossover filters and protection circuitry. The MDETM (Minimum Diffraction EnclosureTM) loudspeaker enclosure is made of die-cast aluminium and shaped to reduce edge diffraction. Combined with the advanced Directivity Control Waveguide TM Positioning the loudspeaker Each 8020A monitor is supplied with an integrated amplifier unit, mains cable and an operating manual. After unpacking, place the loudspeaker in its required listening position, taking note of the line of the acoustic axis. The axes of all loudspeakers should converge at ear height at the listening position (see Figure 1). Connections Before connecting up, ensure that the volume control potentiometer on the front panel is turned fully counter-clockwise to the stand-by setting. Connect the loudspeaker to an earthed mains connection with the supplied mains cable. Never connect the loudspeaker to an unearthed mains supply or using an unearthed mains cable. Audio input is via a 10 kOhm balanced fe- (DCW ), this design provides excellent TM frequency balance in difficult acoustic environments. If necessary, the bass response of the 8020A's can be extended with a Genelec 7050B subwoofer. Figure 1: Location of the acoustic axis Figure 2: Type of cable needed if unbalanced source is used (example shown is RCA output to the XLR input) Figure 3: Control and connector layout on the rear panel of an 8020A. male XLR connector labelled "INPUT". An unbalanced source may be used as long as pin 3 is grounded to pin 1 at the unbalanced source connector (see Figure 2). The male XLR "OUTPUT" connector can be used for daisy-chaining up to six 8020A's together or for connecting a Genelec 7050B or 7050A subwoofer. The volume control attenuates the signal on this output, so the first "master" loudspeaker on a daisy chain can be used to adjust the level on the whole chain. The volume controls on the "slave" loudspeakers should be set fully clockwise. Once the connections have been made, the loudspeakers are ready to be switched on. other source by adjusting the volume control on the front panel. When the volume control knob is turned fully counter-clockwise, the 8020A goes into stand-by mode. The loudspeaker can be left in stand-by mode whenever it is not used, however, it is only completely disconnected from the mains power when the mains cable is disconnected. Setting the tone controls The frequency response of the Genelec 8020A can be adjusted to match the acoustic environment by setting the tone control switches on the rear panel. The controls are "Treble Tilt", "Bass Tilt" and "Bass Roll-Off". An acoustic measuring system such as WinMLS is recommended for analyzing the effects of the adjustments, however, careful listening with suitable test recordings can also lead to good results if a test system is not available. Table 1 shows some Volume control and stand-by switching The input sensitivity of the loudspeakers can be matched to the output of the mixing console or Speaker Mounting Position Flat anechoic response Free standing in a damped room Free standing in a reverberant room Near field or console bridge Near to a wall With a 7050B subwoofer Treble Tilt OFF OFF OFF OFF OFF See above Bass Tilt OFF OFF -2 dB -4 dB -6 dB See above Bass Roll-Off OFF OFF OFF OFF OFF ON Table 1: Suggested tone control settings for differing acoustical environments typical settings in various situations. Figure 4 shows the effect of the controls on the anechoic response. Treble Tilt Treble Tilt control (switch 1) attenuates the treble response of the loudspeaker at frequencies above 5 kHz by 2 dB, which can be used for smoothening down an excessively bright sounding system. Bass Tilt Bass Tilt control offers three attenuation levels for the bass response of the loudspeaker below 2 kHz, usually necessary when the loudspeakers are placed near room boundaries. The attenuation levels are -2 dB (switch 3 "ON"), -4 dB (switch 4 "ON") and -6 dB (both switches "ON"). Bass Roll-Off Bass Roll-Off (switch 2) activates high-pass filtering at 85 Hz to complement the low-pass filter on a Genelec 7050B or 7050A subwoofer. This switch should always be set to "ON" when using the 8020A with these subwoofers. The factory setting for all tone controls is "OFF" to give a flat anechoic response. Always start adjustment by setting all switches to "OFF" position. Measure or listen systematically through the different combinations of settings to find the best frequency balance. Mounting considerations Align the loudspeakers correctly Always place the loudspeakers so that their acoustic axes (see figure 1) are aimed towards the listening position. Only vertical placement is preferred, as it minimises acoustical cancellation problems around the crossover frequency. Maintain symmetry Check that the loudspeakers are placed symmetrically and at an equal distance from the listening position. If possible, place the system so that the listening position is on the centerline of the room and the loudspeakers are placed at an equal distance from the centerline. Minimise reflections Acoustic reflections from objects close to the loudspeakers like desks, cabinets, computer monitors etc. can cause unwanted colouration blurring of the sound image. These can be minimised by placing the loudspeaker clear of reflective surfaces. For instance, putting the loudspeakers on stands behind and above the mixing console and tilting them down to point the acoustic axes to ear level at the listening position usually gives a better result than placing the loudspeakers on the meter bridge. Safety considerations Although the 8020A has been designed in accordance with international safety standards, the following warnings and cautions should be observed to ensure safe operation and to maintain the loudspeaker under safe operating conditions: · Servicing and adjustment must only be performed by qualified service personnel. The loudspeaker must not be opened. · Do not use this product with an unearthed mains cable or an unearthed mains connection as this may compromise electrical safety. · Do not expose the loudspeaker to water or moisture. Do not place any objects filled with liquid, such as vases on the loudspeaker or near it. · This loudspeaker is capable of producing sound pressure levels in excess of 85 dB, which may cause permanent hearing damage. · Free flow of air behind the loudspeaker is necessary to maintain sufficient cooling. Do not obstruct airflow around the loudspeaker. · Note that the amplifier is not completely disconnected from the AC mains service unless the mains power cord is removed from the amplifier or the mains outlet. Minimum clearances Sufficient cooling for the amplifier and functioning of the reflex port must be ensured if the loudspeaker is installed in a restricted space such as a cabinet or integrated into a wall structure. The surroundings of the loudspeaker must always be open to the listening room with a minimum clearance of 5 centimeters (2") behind, above and on both sides of the loudspeaker. The space adjacent to the amplifier must either be ventilated or sufficiently large to dissipate heat so that the ambient temperature does not rise above 35 degrees Celsius (95°F) Mounting options The 8020A offers several mounting options: The Iso-PodTM (Isolation Positioner/DecouplerTM) vibration insulating table stand allows tilting the loudspeaker for correct alignment of the acoustic axis. On the base of the loudspeaker is a 3/8" UNC threaded hole compatible with a standard microphone stand. On the rear there are two M6x10 mm threaded holes for Omnimount® size 20.5 brackets or the keyhole wall mount adapter provided with the loudspeaker. Maintenance No user serviceable parts are to be found within the amplifier unit. Any maintenance or repair of the 8020A unit should only be undertaken by qualified service personnel. Guarantee This product is guaranteed for a period of one year against faults in materials or workmanship. Refer to supplier for full sales and guarantee terms. Figure 4. The curves above show the effect of the "Bass Tilt", "Treble Tilt" and "Bass Roll-Off " controls on the free field response of the 8020A Figure 5. The upper curve group shows the horizontal directivity characteristics of the 8020A measured at 1 m. The lower curve shows the system's power response. SYSTEM SPECIFICATIONS Lower cut-off frequency, ­3 dB: Upper cut-off frequency, ­3 dB: < 65 Hz > 21 kHz CROSSOVER SECTION Connectors: Input: XLR female, balanced 10 kOhm, pin 1 gnd, pin 2 +, pin 3 Output: XLR male, balanced 100 kOhm Pin 1 gnd, pin 2 +, pin 3 Input level for 100 dB SPL output at 1 m: -6 dBu at volume control max Volume control range: -80 dB relative to max output Output signal level is 0 dB relative to input signal level but adjustable by volume control Crossover frequency, Bass/Treble: Treble tilt control operating range: 0 to ­2 dB @ 15 kHz Bass roll-off control operating in a ­6 dB step @ 85 Hz (to be used in conjunction with a 7050B subwoofer) Bass tilt control operating range in ­2 dB steps: 0 to ­6 dB @ 100 Hz The `CAL' position is with all tone controls set to `off ' and the input sensitivity control to maximum (fully clockwise). 3.0 kHz Free field frequency response of system: 66 Hz ­ 20 kHz (± 2.5 dB) Maximum short term sine wave acoustic output on axis in half space, averaged from 100 Hz to 3 kHz: @1m > 96 dB SPL @ 0.5 m > 102 dB SPL Maximum long term RMS acoustic output in same conditions with IEC weighted noise (limited by driver unit protection circuit): @1m > 95 dB SPL Maximum peak acoustic output per pair on top of console, @ 1 m from the engineer with music material: > 105 dB Self generated noise level in free field @ 1m on axis: < 10 dB (A-weighted) Harmonic distortion at 85 dB SPL @ 1m on axis: Freq: 50...100 Hz < 3 % > 100 Hz < 0.5 % Drivers: Bass Treble 105 mm (4") cone 19 mm (3/4") metal dome Both drivers are magnetically shielded 3.7 kg (8.1 lb) Height 242 mm (91/2") (including Iso-PodTM table stand) Height 230 mm (91/16") (without Iso-PodTM table stand) Width 151 mm (6") Depth 142 mm (55/8") Weight: Dimensions: AMPLIFIER SECTION Bass amplifier output power with an 8 Ohm load: 20 W Treble amplifier output power with an 8 Ohm load: 20 W EC Declaration of Conformity This is to certify that the Genelec Monitoring System 8020A conforms to the following standards: Safety: EN 60065: 2002 / IEC 60065:2001 7th Edition EMC: EN 55020 : 2002 + A1 : 2003 EN 55013: (2001) EN 61000-3-2 (2000) EN 61000-3-3 (1995) The product herewith complies with the requirements of The Low Voltage Directive73/23/EEC, EMC Directive 89/336/EEC and 93/68/EEC Long term output power is limited by driver unit protection circuitry. Amplifier system distortion at nominal output: THD < 0.08 SMPTE-IM < 0.08 CCIF-IM < 0.08 DIM 100 < 0.08 % % % % Signal to Noise ratio, referred to full output: Bass > 95 dB Treble > 95 dB Mains voltage: 100, 120, 220 or 230 V according to region ±10 % Idle Full output 5 VA 50 VA Voltage operating range: Power consumption: Signed: Position: Date: Ilpo Martikainen Managing Director 4-May-2005 8020A Operating Manual Genelec Document D0034R001 Copyright Genelec Oy 5.2005. All data subject to change without prior notice www.genelec.com In China please contact: Genelec China Representative Office Soho New Town, 88 Jianguo Road D-1504, Chaoyang District Beijing 100022, China Phone +86 10 8580 2180 Fax +86 10 8580 2181 Email genelec.china@genelec.com International enquiries: Genelec, Olvitie 5 FIN-74100, Iisalmi, Finland Phone +358 17 83881 Fax +358 17 812 267 Email genelec@genelec.com In Sweden please contact Genelec Sverige Ellipsvägen 10B P Box 5521, S-141 05 Huddinge .O. Phone +46 8 449 5220 Fax +1 46 8 708 7071 Email info@genelec.com In the U.S. please contact: Genelec, Inc., 7 Tech Circle Natick, MA 01760, USA Phone +1 508 652 0900 Fax +1 508 652 0909 Email genelec.usa@genelec.com