Controls and connections

MAINS SWITCH / MAINS SOCKET:

The mains switch acts as a mains isolation switch, i.e. it switches the sub-woofer off permanently. If you will not be using the speaker for a long period, the mains switch should always be switched off, or the mains lead disconnected.

ON / AUTO / CTRL

This switch is used to set the operation mode of the subwoofer.

'ON' setting

If the switch is set to the 'ON' position, the sub-woofer remains switched on permanently, regardless of the input signal.

Note:

The 'ON' setting is suitable for use with a switched mains power supply socket (e. g. surround receiver with switched mains outlets).

'AUTO' setting

The speaker switches on automatically as soon as a music signal is present.

'CTRL' setting

The speaker switches on automatically as soon as a switching voltage is present at the switch input CTRL or of the SC LINK socket.

CTRL

Input for control voltage (trigger voltage) to switch the subwoofer on and off. The voltage level of the trigger voltage should be in the range of +5 V . . . +20 V.

 SC LINK (DIN IN)

Input socket for  units with an SCLINK output. In addition to the music signal, this socket passes a switching signal for the automatic power-on circuit, and control information for the internal crossover filters.

Note:

Even machines not fitted with a  SCLINK output can switch the sub-woofer on and off using this socket, provided that they generate a switching voltage (+5V . . .

+15V). In this case please contact the  Service Department for a suitable adaptor lead (see also the section 'Specification' for the pin assignment of the 8- pin SCLINK DIN socket).

 LINE INPUT (CINCH IN)

If the signal to the sub-woofer is to be supplied by a pre- amplifier, connect the pre-amplifier outputs to these input sockets.

These sockets are also used to connect the speaker to the sub-woofer output of a surround decoder. If only one output is available, it is sufficient to connect this to one of the sub-woofer's inputs (e.g. the left one), as the two inputs are identical.

*) Note:

The input sockets LINE INPUT and SC LINK must not be used simultaneously! Please decide which type of connection you wish to use (see section 'Wiring variants').

LEVEL

This adjustor is used to regulate the amplification of the active unit. Adjust the level to set the bass output to match that of your satellite loudspeakers.