Knoll Systems VC100IM warranty When using amps or receivers with 8 ohm capacity

Setting the impedance matching jumpers:

Each of the VC100im volume controls needs to have the jumpers correctly set. The two jumpers are located on the rear side of the volume control. Both channels on all volume controls in this system should be set to the same jumper setting.

The jumper setting is determined by three factors:	X8
1. The speaker impedance (all the speakers in	X4
this system should have the same
impedance).
2. The number of volume controls connected	X2
to one stereo amplifier.	X1
3. The minimum speaker load impedance the
amplifier can handle.
In the illustration both jumpers are shown set in	X8
the X4 position. Ideally, all volume controls in
this system should have their jumpers set to	X4
the same correct position. 4 and 8 ohm
speakers can safely be combined in a system. Use
the 4 ohm settings. The jumper needs to be	X2
pushed on as far as it goes.	X1

To determine the correct jumper or shunt position, use the chart below.

When using amps or receivers with 8 ohm capacity

Jumper setting	X1	X2	X4	X8
4 Ohm speakers	don’t	1 pair	2 pair	4 pair
8 Ohm speakers	1 pair	2 pair	4 pair	8 pair

When using amps or receivers with 4 ohm capacity

Jumper setting	X1	X2	X4	X8
4 Ohm speakers	1 pair	2 pair	4 pair	8 pair
8 Ohm speakers	2 pair	4 pair	8 pair	16 pair

As an example, if the amplifier has 4-ohm capability with 7 pairs of 8 ohm speakers to be installed, set all VC100im jumpers to X4.

Connection and trim-out:Remove about ¼” of insulation from the ends of all wires connected to the volume control and twist the exposed strands. The stereo amplifier or receiver outputs (left and right) are connected to the VC100im top connector labeled “INPUT”. Be very careful to observe the correct polarity. The VC100im uses independent floating grounds so bridged amplifiers can be used safely.

The VC100im is rated for use with maximum 100 watt per channel amplifiers. DO NOT use higher-powered amplifiers with this product for safety reasons.

Wire from the amplifier speaker terminals is always wired in parallel to all VC100im volume controls. To make the installation look neat and tidy, we suggest using one or more WT6 connection strips. When connecting to the amp make sure its power is switched off. Again strictly observe wiring polarity.

Connect the four position connectors labeled “OUTPUT” to the stereo speakers they will control. Again series and parallel speaker wiring is acceptable so that the impedance the volume control sees is between 4 and 8 ohms. Be sure to strictly observe polarity, as incorrect polarity will result in poor bass performance.

When installing the volume control into the wall, we suggest moving any inside wall fixtures such as vapor barriers away from the autotransformers if possible.