The Amp Box RS Mono from Pro-Ject offers 3-dimensional sound-staging, perfect microdynamics, and audiophile resolution combined with high power output and 2-ohm capability.

It’s the perfect solution for Bi– or Tri-Amping applications. Amp Box RS Mono is the perfect companion for Pre Box RS and will give pure sound experience, that the real audiophile is looking for.

Additional information
Weight 1.89 kg
Dimensions 22 × 20.6 × 7.2 cm



  • Highly efficient conversion from mains to output power (92%)
  • 2 ohms drive capability
  • Tube buffer stage with reference quality
  • SMD construction for shortest signal paths
  • Line level preamp inputs (RCA & XLR)
  • Top-quality speaker terminals
  • Metal casing protects against vibration and interference
  • DC power supply (< 1 Watt standby power)
  • Available in silver or black
  • Handmade in Europe


  • Tubes: 1 x ECC88 (6922)
  • Power output: 120W/180W at 8 ohms/4 ohms
  • Frequency response: 20Hz – 50kHz (-0,8dB, -3dB)
  • Channel separation: >100dB bei 20kHz
  • Noise floor: >-100dB (A weighted)
  • THD: <0,05% at 100W
  • Gain: 26dB
  • Pre in: 1 RCA/phono socket
  • 1 XLR socket
  • Wiring: 1 ground, 2 “hot” and 3 “cold”
  • Input sensitivity: 1,35V
  • Input impedance: 22kohms
  • Speaker connectors: 4mm banana plugs, spades connectors or naked wire
  • Outboard power supply: ±48V/2,5A DC, suitable for your country’s mains supply
  • Power consumption: 2,5A DC, <1W in standby

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