Allo Relay Attenuator - 10k Stereo

Relay Attenuator (RA) is a hardware volume control. It takes input from DAC shields and attenuates the output by relay switching. This is Allo's Relay Attenuator, designed to be used with the Piano 2.1 & Boss DACs!

The Relay Attenuator has been designed for Audio attenuation after Piano DAC output, and features a 1dB step size. It's a compact circuit, featuring just 6 tiny relays, implementing a 64-step logarithmic stereo attenuation.The 64 steps of 1.0dB span a 63dB audio attenuation range. By avoiding any active electronics, relay attenuation results in a very clean and open sound.

Simply plug in above your DAC and then take the output attenuated by relays switching, to thin film 0.1% 25ppm SUSUMU audio grade resistors.

The nominal value is 10k.

Features:

• Constant Input resistor:10K
• Load resistance: 60K
• Resistance standard:E192
• Step Size :1dB
• No.of relays:6
• No.of Steps:64dB
• Input audio connectivity: Stereo inputs through on-board RCA Connectors.
  • Left Out: white RCA connector.
  • Right Out: Red RCA connector.
• Output audio connectivity: Stereo outputs through on-board RCA Connectors.
  • Left Input: white RCA connector.
  • Right Input: Red RCA connector.
• PCB Dimension: 85x67.8x22.2mm (W*L*H)
• Weight: 42gm.
• Operating Temperature: 0 o C to 70oC

Downloads

• Relay Attenuator User Manual
• Relay Attenuator Tech Manual
• Configuring Allo Audio Cards for Raspberry Pi
• How To Use The Relay Attenuator With Volumio
• Relay Attenuator Measurements and Graph