User manual GENELEC 7000

[. . . ] LSE Series Operating Manual Genelec 7060A, 7070A and 7071A Active Subwoofers 7060A, 7070A and 7071A Active Subwoofers General description Genelec 7060A, 7070A and 7071A are powerful active subwoofers, incorporating all the amplifier and crossover electronics needed for bass management and reproduction in modern 6. 1 or 5. 1 channel surround sound or traditional stereo systems. Their 19 to 120 Hz (±3 dB) (29 to 120 Hz on the 7060A) frequency range, ample sound pressure capability and versatile connections make these subwoofers ideal companions for Genelec's active monitoring speakers. easy subwoofer level matching with various main speakers. The low pass frequency of the LFE input channel can be set to 85 Hz, 120 Hz or 85 Hz with "Redirect" function that routes LFE content above 85 Hz to the front center monitor. [. . . ] The height and depth of the recess should not be any bigger than those needed to fit the subwoofer flush with the wall surface. panel. Table 1 provides some suggestions for the "Bass Roll-Off" switch settings. When both roll-off switches are set to "OFF", a flat anechoic response is obtained. Setting the phase control Incorrect phase alignment between main monitors and subwoofer causes a drop in the frequency response of the whole system at the crossover frequency. 4) show the effect of phase difference to the frequency response. The phase difference between the main monitors and subwoofer at the listening position is dependent upon the position of the subwoofer, so the phase adjustment should be done only after the preferred position is found. Acoustic measuring equipment is required for accurate system alignment. If this equipment is not available, the following coarse phase matching can be applied. Minimum clearances to walls or other objects The power amplifiers are attached to the lower part of the aluminium grille, which functions as a heatsink. Do not cover the grille or place the subwoofer so that there is less than 10 centimeters (4") of free space in front of the grille. Make sure that the space underneath the subwoofer is clear from obstructions. Thick carpets may block the ventilation clearance needed for cooling the electronics' box. The reflex port side (opposite of the amplifier panel side) should always have a clearance of at least 7, 5 centimeters (3") to any objects to ensure proper functioning of the reflex port. Setting the input sensitivity The subwoofer requires input sensitivity alignment to the source to obtain a correctly balanced system. The input sensitivity control is located on the amplifier panel of the subwoofer. An input voltage of -6 dBu with a -6 dBu input sensitivity setting will produce 100 dB SPL @ 1m in free field. To obtain a 110 dB SPL output an input voltage of +10 dBu is required when the input sensitivity is set to 0 dBu. Setting the Bass Roll-Off switches The acoustic response of the subwoofer may have to be matched to the characteristics of the room and the positioning in which it will be used. To adjust the subwoofer to match these characteristics use the ''Bass Roll-Off' control switches located on the amplifier Coarse phase adjustment method Genelec 7060A, 7070A and 7071A subwoofers are equipped with a built-in 85 Hz frequency test tone generator for easy phase alignment. The test tone generator is connected to the subwoofer's "FRONT CENTER OUT" channel only. In a stereo system it is Flush mounting the subwoofer If the subwoofer is flush mounted into a wall or a cabinet, it is important to ensure unrestricted airflow from the reflex port and ampli- consists of a LED in a compact case and a RJ11 cable to connect the case and the "REMOTE" RJ11 connector on the amplifier panel. Subwoofer bypass control A bypass control feature is included in the subwoofer circuits so that the effect of the subwoofer on the whole monitor system can be determined. With the bypass switch on, the high pass filters for the main monitors are overridden and the system behaves as if the subwoofer was not connected. The bypass function has no effect on the LFE input. Two different bypass remote controllers are available as optional equipment: 1092-400 switch that can be connected to a 1/4" jack connector on the amplifier panel and 7000-416 that connects to the "REMOTE" RJ11 connector. The 7000-416 option also includes remote Table 2. Recommended subwoofer/main monitor combinations. control of the "LFE +10 dB" function and a link for the 7000-415 remote LED option. necessary to temporarily connect either of the channels to this output. [. . . ] The decoder will automatically provide +10 dB LFE gain. Using multiple subwoofers Genelec 7060A, 7070A and 7071A subwoofers are equipped with a "SUM OUT" connector to provide an easy way of coupling two or more subwoofers together in high SPL applications. Table 2 shows the recommended configurations with different Genelec monitors. Connect an XLR cable from the "SUM OUT" connector of the "master" subwoofer to which the main monitor channels are connected, to the "LFE IN / SUM IN" connector of the other, "slave" subwoofer and turn the "SUM IN MODE" dip switch on the "slave" subwoofer to "ON". When two subwoofers connected in this way are positioned close to one another, bass level increases by 6 dB. [. . . ]