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Volume Controls

VOC120im

Outdoor Impedance Matching Autoformer Stereo Volume Control

  

  • Surface mount weather-resistant volume control with 12 positions including fully off.
  • Easy to install and cost-effective.
  • Impedance matching at 1 times, 2 times, 4 times or 8 times for up to 16 pairs of speakers safely connecting to one amplifier.
  • Make before break switch eliminates pops and clicks.
  • Detachable wire terminal reduces installation time.
  • Attractive all weather enclosure has maximum amount of UV light resistance.
  • Available in white and gray.

 

Since 1985 Knoll has been the world market leader for premium sound quality volume controls and stereo interfaces.

The VOC120im is a surface-mounted, weather-proof, speaker-level volume control. It connects between the speaker outputs of an amplifier or receiver and a pair of speakers. The 1x setting allows the volume control to be used as a standard non-impedance matching control. The 2x, 4x, and 8x settings allow it to be used as an impedance matching control with up to 16 pairs of speakers and volume controls safely connected to one amplifier. Separate impedance matching components are not required. The volume is adjusted by attenuating the amplifier signal output of the volume control to the speakers.

The VOC120im is designed to provide volume control for outdoor or wet locations. It can be mounted on an exterior wall or hard, flat surface, as well as directly on a section on 1" PVC conduit. It's superior design gives excellent protection against moisture from rain, splash, or even in a sauna. Using make before break switching topology eliminates pops and click while adjusting the volume. Installation is fast and easy as the detachable high current connector can be installed long before trim out. The connector can accept 12-24 gauge wire.

The Knoll WT6 one stereo input to six stereo output connection strip is available to neaten the wiring of larger systems.

Specifications:

Peak RMS Power Rating 120 watts per channel
Continuous RMS Power 60 watts per channel
Frequency Response 20 to 20,000 Hz
Impedance Settings 1x, 2x, 4x or 8x
Mount Depth (with knob) 4.25" (10.8 cm)
Dimensions 5" h x 2-3/4" w (12.7 x 7 cm)
Speaker Impedance 4-16 ohms (single or multiple speakers)
Connection Removable screw terminals
Colors & Styles Order as white or gray with matching knob

Wire Requirements:

Speaker wire for the VOC120im should be copper, minimum 18 gauge. Runs longer than 33' (10 m) should be 16 gauge wire. Two wire pairs (left and right) are run from the stereo amplifier or receiver to the VOC120im volume control, then one wire pair continues to each speaker. VOC120im volume controls can be daisy chained together. When "pre-wiring", leave an extra 3' (1 m) at each end to allow easy component installation.
© Knoll Systems 2005