RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator


RDL RU-VCA6A Digitally Controlled Six Channel Audio Attenuator

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UPC: nan SKU: RDL-RU-VCA6A Category: Brand:


The RU-VCA6A is a full-featured studio-quality dual-channel audio attenuator module for local and/or remote control of balanced or unbalanced line-level sources. The RU-VCA6A has six audio channels for level control of surround sound (5.1) or six individual analog audio channels. Each module can be remote controlled from a single or multiple locations. Rear-panel terminals provide flexible control options using a variety of RDL remote controls or OEM equipment.

Audio levels are controlled in 0.5 dB steps using noiseless zero-crossing digital attenuators for optimum reliability, precise tracking and long-term click-free service. Exceptional wide-band low-noise performance makes the RU VCA6A suited to level adjustment in the most demanding applications. Rear-panel inputs and outputs may each be wired balanced or unbalanced.

The RU-VCA6A powers up in one of two operating modes set by a rear-panel switch.


  • Local or Remote Audio Level Control
  • Six Channel / Surround Attenuation
  • Noiseless Zero-Crossing Adjustment Steps
  • 96 dB Attenuation Range in 0.5 dB Steps
  • Data Bus Provides Adjustment of Multiple Modules
  • Multiple Remote Control Locations Possible
  • Precise Level Tracking on Each Channel
  • Balanced or Unbalanced Line Inputs/Outputs
  • Adjustable Ramp Up/Down Rates
  • Controllable Using Various RDL Remote Controls
  • Selectable Level Control Options:
  • Pushbuttons (Internal or External)
  • Momentary Pulses (External/Rotary Encoder)
  • 0 to10 Vdc or 10 kO Potentiometer
  • Selectable Power-Up Return to PRESET or LAST Level
  • Selectable MASTER/SLAVE Mode for Control Expansion


  • Inputs (2, RU-VCA2A; 6, RU-VCA6A): >10 kŸ€ Balanced bridging, or Unbalanced, line level
  • Frequency Response: 10 Hz to 50 kHz (+/- 0.5 dB)
  • THD+N: < 0.005% (20 Hz to 20 kHz)
  • Gain: Adjustable from unity to <­V96 dB
  • Step Size: 0.5 dB
  • Headroom: > 18 dB (above +4 dBu)
  • Residual Noise: < -90 dB (referred to +4 dBu at unity gain)
  • CMRR: <-65 dB (50 to 150 Hz)
  • Crosstalk: <-95 dB (1 kHz, typ.); < -85 dB (20 Hz to 5 kHz); < -75 dB (5 kHz to 20 kHz)
  • Ramp Times: 0.5 second delay; then: 3 seconds to 10 seconds
  • (UP and DOWN times individually adjustable on front panel)
  • Indicators (10): Front-panel LEDs indicating relative audio level (8), MAX condition (green), MIN condition (red)
  • Audio Output (2, RU-VCA2A; 6, RU-VCA6A): 150 Ÿ€ balanced (may be connected unbalanced)
  • Ramp Output: 0 to 10 Vdc, (Ground-referenced) Note: Not intended to drive additional VCA 0-10V inputs
  • EQ Ramp Output: 0 to 10 Vdc, (Ground-referenced) Note: dc taper intended only to drive RDL Loudness EQ (ST-LEQ1)
  • Power Requirement: 24 Vdc @ 120 mA, Ground-referenced (RU-VCA2A); 24 Vdc @ 200 mA, Ground-referenced (RU-VCA6A)
  • Ambient Operating Environment: 0›X C to 50›X C
  • Case Dimensions: 5.75­” (14.6 cm) W x 1.65″ (4.18 cm) H x 3.54­” (9.0 cm) D;3.9″ (9.9 cm) D with connectors

Additional information

Weight 1.52 lbs


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