7050B Operating Manual Genelec 7050B Active Subwoofer
Genelec 7050B Active Subwoofer General description Genelec 7050B active subwoofer is a very compact low frequency loudspeaker, designed to extend the bass reproduction of Genelec 8020A active loudspeakers in stereo or surround applications and models 8030A or 8130A in stereo applications. Adding the 7050B to these loudspeakers creates a compact nearfield monitoring system capable of a flat frequency response from 25 Hz to 20 kHz (± 3 dB).
Figure 2. XLR to RCA connector for unbalanced operation. Figure 1. 7050B's amplifier panel, connectors and controls. .1 output channel of a 5.1-channel discrete surround sound source. Once all connections have been made, the subwoofer and main loudspeakers are ready to be powered up. Positioning in the room The placement of the subwoofer in the room affects the overall frequency response and sound level of the system dramatically, as at low frequencies the effects of the room are strong.
Phase Difference: 90° Phase Difference: 0° 85 Hz Subwoofer placement Bass Roll-Off setting Near to a wall -2 dB In a corner -6 dB Flush mounted -2 dB Table 1. Suggested Bass Roll-Off settings 85 Hz Phase Difference: 270° Phase Difference: 180° 85 Hz 85 Hz Figure 4. The effect of phase difference between the subwoofer and the main loudspeakers a drop in the frequency response of the whole system at the crossover frequency. The graphs above (Fig.
the main channels when mixing music and sound effects for film release. In Dolby Digital and DTS encoding formats the LFE channel has to be monitored with +10 dB gain in relation to the main channels. The object is to increase the recording headroom of the LFE channel. Consumer and theatrical decoders automatically add +10 dB of LFE gain to restore the level balance.
7050B Operating Manual SYSTEM SPECIFICATIONS AMPLIFIER SECTION 7050B Free field frequency response (± 3 dB) 25 Hz...85 Hz LFE 85/120 Hz Maximum short term sine wave SPL output averaged from 30 to 85 Hz, measured in half space at 1 meter 100 dB Self generated noise level in half space at 1 m on axis (A-weighted) ≤ 15 dB Harmonic distortion at 90 dB SPL at 1 m on axis in half space 30… 85 Hz 2nd 3rd ≤ 4% ≤1% Driver, magnetically shielded 205 mm (8") Weight 18 kg (39.
