Knoll Systems Mixer VS150IM User Manual

Operation: Knoll volume controls are very easy to use. The VS150im  
has a total of 12 different volume settings including fully off.  
To increase the volume (in this room only), slide the volume control  
knob upwards. To lower the volume, slide the volume control knob  
downwards.  
VS150im  
Impedance Matching Volume Control  
Installation Instructions v1.3  
To set the correct amplifier or receiver volume setting, we suggest  
that you turn the Knoll room volume control in one room to maximum.  
Adjust the amplifier or receiver volume to the loudest comfortable  
setting you will use and no further or louder. This way the Knoll  
volume control has the most usable settings. If the amp volume  
control was set louder, the Knoll volume control would have to be  
turned down to be back at a comfortable level with less overall volume  
positions available.  
Warning: To be installed and/or used in accordance with appropriate  
electrical codes and regulations.  
Caution: Do not install these keypads in an electrical junction box  
with 110V or higher unless an approved barrier separates the high and  
low voltage sections.  
Description: The Knoll VS150im is a twelve-position in-wall  
mountable stereo speaker volume control with impedance matching  
capability. From one to sixteen pairs of speakers can be safely driven  
from one stereo amplifier using an equal number of VS150im’s.  
Separate impedance matching components are not required. The Knoll  
WT6 one stereo input to six stereo output connection strip is available  
to neaten the wiring of larger systems.  
Warranty  
Knoll Systems warrants the VS150im sold in the USA and Canada by authorized  
Knoll dealers to be free of defects in materials and workmanship. This warranty  
extends for three full years from the date of purchase by the original consumer.  
Any products returned to Knoll Systems and found to be defective by Knoll  
Systems within the warranty period will be repaired or replaced at Knoll  
Systems option, at no charge. Knoll Systems will not be responsible for the  
actual cost of installation or removal of the product, nor for any incidental or  
consequential damages. Some states do not allow the exclusion or limitation of  
incidental or consequential damages, so the above limitation may not apply to  
you. This warranty gives you specific legal rights. You may have additional  
legal rights that vary from state-to-state.  
A rotary switch version is available, model VC150im.  
Basic System Layout and Pre-Wiring: A stereo amplifier controls  
multiple pairs of speakers. Decide where the speakers and volume  
controls will be placed in the various rooms. When wiring always leave  
an extra couple of feet of wire at both ends so installation of the  
speakers and volume controls is quick and easy. Up to 16 pairs of 8-  
ohm speakers can be safely connected to one amplifier. (8 pairs of 4-  
ohm speakers).  
Specifications  
Peak RMS Power Rating 150-watts per channel  
Continuous RMS Power 75-watts per channel  
Run a fire-rated two-conductor speaker wire (14-18 gauge wire) from  
each speaker to the volume control location in each room. Next, run a  
four-conductor speaker wire from the volume control to the amplifier  
location. Ideally each run back to the amplifier is a home run, but  
wires can be daisy chained from room to room. If you plan to daisy  
chain the wiring we suggest using larger 14-gauge wire. If 2 pairs of  
speakers are being controlled by 1 volume control, wire the 2 pairs in  
series if they are 4 or 6-ohms and parallel if they are 8 or 16-ohms.  
Our web site has information on how to wire in series and parallel.  
Frequency Response  
Mounting Depth  
20 to 20,000 Hz  
2.25" (5.7cm)  
Fits single gang  
Electrical Junction Box  
4-16 ohms (single or multiple  
speakers)  
Speaker Impedance  
Connection  
Detachable screw terminals  
Warning: Never attempt to make the final combined speaker  
impedance less than 4-ohms as this may cause safety issues.  
Knoll Systems  
To make final trim-out quicker, the detachable connectors with the  
VS150im can be added to the wires now. They are available in bulk  
packs without the volume controls from Knoll.  
To tidy up the installation, use Knoll’s WT6 seven position wire  
connection strip at the amplifier. Two or more may be required for  
some installations.  
145 Tyee Drive Point Roberts, WA 98281 USA  
14-7163 Vantage Way, Delta BC V4G 1N1 Canada  
Tel: (604) 940-1689, fax (855) 734-3363  
 

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