Pro-Ject Amp Box RS

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The Amp Box RS delivers high-end sound a compact elegant aluminum chassis. The fully balanced dual-mono circuit design incorporates a tube input buffer stage for reference-grade sound quality. Premium parts are used throughout this ultra-high efficient (92%) PWM amplifier design including ultra reliable dip switches and anti-microphonic chassis construction. Delivering 120W x 2 into 4 ohms and 90W x 2 into 8 ohms, the Amp Box RS remains stable into even a 2 ohm load! A robust and highly regulated outboard power supply is capable of delivering ample voltage for impressive dynamic capabilities and in the near future, an upgraded power supply will be available as an option. It really is extraordinary how much power and fidelity the Amp Box RS can deliver in such a compact package.


  • Tubes: 2 x ECC88 (6922)
  • Power Output:
    • 2 x 110W / 180W at 8 ohms / 4 ohms (both channels driven)
    • 2 ohm drive capability
  • Frequency Response: 10Hz - 50kHz (-0.8dB, -3dB)
  • Channel Separation: >100dB below 20kHz
  • Noise Floor: >-100dB (A weighted)
  • THD: <0.05% at 100W
  • Gain: 26dB
  • Pre In:
    • 1 pair RCA JACKS
    • 1 pair XLR
  • Input Sensitivity: 1.35VInput Impedance:22kohms
  • Speaker Connectors: 4mm ∅ banana plugs, spades connectors or naked wire
  • Power Supply: ±48V/2.5A DC
  • Power Consumption: 2.5A DC, <1W in standby
  • Dimensions (W x H x D): 8.1 x 2.9 x 7.9 in., 206 x 72 x 200 mm
  • Weight: 4.7 lbs., 2,120g without power supply
  • Finish: Black or Silver

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