Quam QC10
Wall-mount Volume Control Attenuator


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Quam QC10 series of attenuators are designed to provide local or remote level control of 25 or 70.7 volt distributed loudspeakers. These attenuators can be used to control a single speaker or groups of loudspeakers when the total speaker load is twenty watts or less. Each model provides ten standard steps of attenuation plus an “off” position. Model QC10 features a contemporary style, embossed position identification stainless steel trim plate. QC10 Classic is the traditional style, embossed, paint filled stainless steel trim plate.

All models in this series except QC10RM include screws to mount to standard single gang electrical boxes with a depth requirement of 2-1/8 inches. Model QC10RM is supplied with a 2” x 2” dial scale and a barrel extension nut to accommodate mounting to rack panels up to 1/8” thick.


  • Twenty watt continuous power rating
  • Protective bracketing guards against accidentaldamage to switch leads during installation
  • Durable, insulated, stranded switch leads preventbreakage and accidental grounds
  • Positive stop action switch
  • Two styles of stainless steel trim plate


  • Power Rating: 20 Watts continuous
  • Positions: 10, plus “0” (off position)
  • Attenuation Steps, Ref. 70.7 volt line: Steps 1-2 = -6 dB, Steps 3-10 = -3 dB
  • Total Attenuation: -36 dB (Not including “0”position)
  • Insertion Loss: < .5 DB
  • Wall Mounting Plate: Single gang brushed stainlesssteel
  • Recommended Wall Box: (Flush) Rayco #600 orequivalent, (Surface) Quam SE4W
  • QC10P Relay: Voltage 24 VDC Current .015 Ampere
  • Control Knob: Black w/ White position indicator

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