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). The 7050B should not be used in surround applications with the 8030A or 8130A due to their greater SPL capacity.

Driver

The 7050B contains a single 205 mm (8”) magnetically shielded low frequency driver, housed in a Genelec Laminar Spiral Enclosure TM (LSETM) bass reflex cabinet.

Crossover

The crossover contained within the amplifier has a fixed 85 Hz low pass filter for the five main channels. However, the signal passing through the “OUT” connectors is full band- width, i.e. not filtered. Because of this, the “BASS ROLL-OFF” switch (switch 2) on the main loudspeakers must be switched on to avoid unwanted overlapping of the frequency

bands between the subwoofer and main loud- speakers. Due to this and the input sensitivity of the 7050B subwoofer, it can only be used with Genelec 8020A, 8030A, 8130A, 1029A, 2029A and 2029B active loudspeakers. The LFE input has a selectable 85/120 Hz low pass filter and selectable 0/+10 dB input sensitivity. The overall input sensitivity of the subwoofer can be reduced from -6 dB to +12 dB for easy level matching with the main loudspeakers

Amplifier

The amplifier produces 70 W of output power, with very low THD and IM distortion. Driver overload protection and power-on signal muting is included in the amplifier circuitry. The amplifier also incorporates thermal overload and short circuit protection

Installation

The subwoofer is supplied with a mains cable and this operating manual. Once unpacked inspect the subwoofer to ensure that it has not been damaged in transport. Check that the mains voltage marking on the back panel matches your local mains voltage. Ensure that both the subwoofer and the main loudspeakers are switched off before making any connections.

Audio connections are made with balanced XLR cables. The 7050B has IN/OUT connector pairs for five main channels and a dedicated LFE input connector for the LFE channel. Connect the signal cables from your source to the female XLR "IN" connectors on the lower connector row. Next connect XLR cables from the corresponding "OUT" male XLR connectors on the upper row to the input connectors of each main loudspeaker. Turn the volume control knob on all main loudspeakers fully clockwise and switch the "BASS ROLL-OFF" dip switch (switch 2) on all main loudspeakers to "ON". This switch actuates an 85 Hz highpass filter on the main loudspeakers matching them to the main channel lowpass filter of the subwoofer

Alternatively, you can connect a stereo pair of loudspeakers by routing the signal cables from the source to the input connectors of the main loudspeakers and an another pair of cables from the main loudspeakers' output connectors to the "IN" connectors on the 7050B. In this configuration the volume controls on the main loudspeakers affect the playback level of the 7050B, too. The "BASS ROLL-OFF" switch on the main loudspeakers must be switched to "ON".

Use the "LFE IN" connector for the LFE or