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• Fully balanced design (Pulse Wave Modulation)  
• 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 terminal
• Metal casing protects against vibration and interference
• DC power supply (< 1 watt standby power)
• Available in silver or black
• Optional Upgrade: Linear power supply Power Box RS Amp
for higher power output and further improved sound quality

Amp Box RS (Mono)

  • Ultimate high-end sound with high efficiency in a compact luxury casing!  

    Four specific characteristics make this a true high-end amplifier:  

    1. Fully balanced mono design  

    2. Highly efficient energy saving PWM modules  

    3. Tube buffer input stage  

    4. Upgrade option Power Box RS Amp for more power and further improved sound quality.  


    Amp Box RS Mono offers 3-dimensional sound-staging, perfect micro dynamics and ultimate resolution combined with high power output and 2 ohm capability and is 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.  

    Because of its heat emission Amp Box RS Mono luxury casing, which is available in silver or black, should not be combined with Design Box Acryl.  

  • Technical data

    Pro-Ject Amp Box RS Mono

    Tube assembly 1 x ECC88 (6922)
    Power output 1 x 125W / 195W @ 8 ohms / 4 ohms
      2 ohms drive capability
    Frequency response 10Hz - 50kHz (+ 0dB, - 3dB)
    Signal to noise ratio >-100dB (IEC -A)
    THD < 0,05% @ 100W
    Input RCA & XLR-socket
    Input sensitivity 1,35V
    Input Impedance 22kohms
    External power supply 48V/2,5A DC;100 - 240V, 50/60Hz
    Standby consumption < 1watt
    Dimensions W x H x D 206 x 72 x 200 (220mm with sockets)
    Weight 2020g without power supply
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