Knoll VC220 User manual

WireRequirements
Speaker wire for the VC220/VC220pm should be
copper, 14-18 gauge. Runs longer than 33' (10m) should
be minimum 14 gauge wire. Two wire pairs (left & right)
are run from the stereo amplifier or receiver (or looped
from any other VC220pm input) to the VC220pm
inputs, then one wire pair continues to each speaker.
When "pre-wiring", leave an extra 3' (1m) at each end to
allow easy component installation.
A cat 3 or cat 5 eight conductor wire is run from the
VC200pm to the nearest keypad. Wire from multiple
keypads can be lopped or home run. Keypads with
internal infrared receivers do not require any extra wiring
from the keypads to the controllers.
A 12VDC power supply (such as the PS1202) for the
VC220/VC220pm's needs to be located at the stereo and
plugged into the receiver and plugged into the receivers
switched outlet. One PS1202 can power upto 5
VC220pm's.
VC200 Series Digital Stereo Volume Controls
KnöllSystems
tel:[phone]
fax:[phone]
In America:
145 Tyee Drive
Point Roberts, WA 98281
In Canada:
11791 Machrina Way, #120
Richmond, BC V7A 4V3
Specifications
Peak RMS Power Rating: 200 watts/channel
Continuous RMS Power: 100 watts/channel
Frequency Response: DC to 500,000 Hz at
all power levels upto
350 watts +/-0.1 dB
VC200/VC201
Mount Depth: 1.5" (38 mm)
Speaker Impedance: 4-16 ohms (single or
multiple speakers)
Connection: Detachable screw
terminals
Colors and Styles: Decorawhite,almond
or ivory
VC220/VC220pmPower: 12VDC 60mA max
VC220/VC220pm Controller: Wall mount 6.5" x
3.4" x 1.75"d
Keypads do not include cover plates.
www.knollsystems.com
The digital volume control is a two-piece system
consisting of a VC220 or VC220pm controller and a
VC200 keypad, VC201 keypad or VCI28 computer
interface. The controller is usually located in an electrical
room, low voltage panel, closet or near the stereo. From
one to three VC200 or VC201 keypads can be
connected to each VC220/VC220pm. The keypad is
connected to the VC200/VC220pm controller with low
cost cat3 or cat5 wire.
The VC220/VC220pm V-pad design does not generate
heat like a transformer or L-pad that can dissipate large
amounts of power in low and off positions creating early
failures, wall damage or even a fire hazard. Nor is there
any sonic degradation at low operating levels. Instead the
VC220/VC220pm presents the listener with a full
frequency response and original dynamic range at all
volume positions and power levels. The stereo signal
passes to the speakers without the compression effect
associated with all transformer based volume controls.
Knöll V-pad transformer-free technology is the best and
most reliable solution for new construction, renovations
and upgrades of existing stereo systems.
VolumeControlFrequencyResponse
With identical paralleled inputs and 8-ohm output loads,
the -12dB attenuation output frequency
response of a Knöll transformer free vs. a top quality
major brand autotransformer volume control is shown.
Your Authorized Knöll Dealer
Specifications subject to change without notice
January 2001
-48dB
-60dB
-72dB
-12dB
-36dB
-24dB
○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○ ○○○○○○○○○○○○
○○○ ○ ○○○○○○○○○○○○○○○○○
○○○ ○ ○○○○○○○○○○○○○○○○○
○○○ ○ ○○○○○○○○○○○○○○○○○
○○○ ○ ○○○○○○○○○○○○○○○○○
0dB
1kHz 10kHz100Hz10Hz
-6dB@11.5kHz
-6dB@58Hz
○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○
.
○○○
Knöll VC22O/VC220pm tranformer-free volume
control output frequency response
Top of the line major brand autotransformer volume
control output frequency response
Both Stereo volume control inputs
.
VC200 VC201 VC220/VC220PM
Control Interface