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Pro-Ject Amp Box RS Mono Power Amplifier
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Pro-Ject Amp Box RS Mono Power AmplifierPro-Ject Amp Box RS Mono Power AmplifierPro-Ject Amp Box RS Mono Power Amplifier

Pro-Ject Amp Box RS Mono Power Amplifier

  (2 Reviews)
£582.50 Exc. VAT |  


Project Amp Box RS Mono Power Amplifier

The Amp Box RS Mono has multiple specific characteristics which make it a true high-end amplifier. The amplifier has a fully balanced double mono design, a highly efficient energy saving PWM modules as well as a Tube buffer input stage. 

The Amp Box RS Mono also come with the available option of an upgrade PS Box RS for more power and an improved sound quality. 

Box Design's Amp Box RS Mono offers a 3-dimensional sound-staging, perfect micro dynamics and an ultimate resolution combined with a high powered output and 2 ohm capability. Audio loop-outputs and Trigger In/Out on the Amp Box RS Mono make it the perfect solution for Bi– or Tri-Amping applications.

Key Features:

  • Fully balanced double mono 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 
  • Low heat emission 
  • Line level preamp inputs (RCA & XLR) 
  • Top-quality speaker terminals 
  • Luxury metal casing protects against vibration and interference 



Power Output: 1 x 125W/195W At 8ohms/4ohms 
2 Ohms Drive Capability
Frequency Response: 10Hz - 50kHz (+0dB, -3)
THD: < 0.05% At 100W
Noise Floor: > -100dB (IEC -A)
Input: RCA & XLR Sockets 
Input Sensitivity: 1.35V 
Input Impedance: 22Kohms 
Speaker Connectors: 4mm Ø Banana Plugs, Spades Connectors Or Naked Wire
External Power Supply: 48V/2.5A DC;100 - 240V, 50/60Hz
Dimensions W x H x D: 206 x 72 x 200mm (220mm With Sockets)
Weight:  2020g Without PSU 
Average Rating (2 Reviews):  
Write a Review and share your opinions!

Brilliant Design
Tuesday, 13 October 2020  | 

I use four of these amplifiers in a system with active crossovers and with both vinyl and CD playback. The sound quality is marvellous compared to some much more expensive coventional class A/B amplifiers I once used. Because these amplifiers are digital they also waste very little energy and don't produce much heat in everyday use: an increasingly important characteristic in these times of high electricity bills. The sound quality is nevertheless 'analogue' in nature and is without any audible digital artefacts. I can't imagine anyone being disappointed with the sound quality. The bass extension is great and the rest of it is extremely detailed and provides a very clear and transparent window into the music. The term 'microdymanics' seems very appropriate, and has been mentioned by others: these units are extremely revealing of subtle details that I had never had the pleasure of hearing before. I have not used the upgraded power supplies to date and so cannot comment on those but I assume they create a lot more headroom if you like your music very loud.

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1 of 1 people found this review helpful.

Part of Complete Upgrade
Monday, 15 June 2015  | 

This is me two months into complete upgrade to the Pro-Ject "RS Line". I Purchased the mono amp boxes, pre-box, phono box, headbox and stream box.

Straight away the sound stage that was present by these little project boxes was very very impressive. With the valve stages there is a warm sound presented with lots of depth and detail which suits my listening preference to a "T". The build quality is excellent and the size was a big plus point from an aesthetics and space perspective.

There was "out of the box issue" with the Headbox but a quick email to the guys at Analogue Seduction and it was sorted straight away with an excellent no hassle/quibble replacement service. Great Service from the Analogue Seduction Team

I would have no reluctance in recommending the Pro-ject boxes to anyone. And anyone who has heard them is always left impressed. As I said, I am now 2 months in and they continue to surprise and delight.

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3 of 3 people found this review helpful.

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