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Home > Products > Amplifiers > Pro-Ject Audio > Amp Box S

Amp Box S

Amp Box S
£219.00
Select Colours Available
In stock


The Pro-Ject Box Design Amp Box S is an ultra-compact power amplifier, which is both efficient and audiophile. Boasting an impressive 30 Watt output, this small but perfectly formed box will boost any small hi-fi system.

A ultra-high-efficiency, Bi-Phase PWM (Pulse Wave Modulation) circuit with SMD parts gives outstanding audio performance and stays cool on the outside when in use. The sound quality from the Amp Box S is aimed to be as close as possible to Class A tube amplifiers, with their liquid and life-like presentation.

The Amp Box S is micro-sized, allowing for easy placement in any environment. It can also be remotely switched off via a trigger signal (a 45cm power-on cable is supplied for this purpose) for convenient operation. When bi- or tri-amping, this remote power signal can also be relayed to multiple units.

Key Features:

  • Bi-Phase PWM(Pulse Wave Modulation) circuit
  • Discrete design for ultra-dynamic playback and highest resolution
  • SMD for short signal paths
  • 2 x 35W @ 4ohms / 2 x 25W @ 8ohms
  • Ultra high-efficiency: approximately 80% of power consumption goes to “power out”
  • Gold-plated, over-sized binding posts
  • Trigger-switching with Loop-out
  • Metal case shields the electronics from vibrational and electromagnetic interference
  • Outboard power supply included

Technical Data:

Power Output: 2 x 25W at 8Ω (Both Channels Driven), 2 x 35W at 4Ω (Both Channels Driven)

Frequency Response: 5Hz - 20kHz (+ 0dB, - 0.5dB)

Channel Separation: >40dB At 20kHz

Noise Floor: > -100dB (A Weighted)

THD: < 0.05% At 10W

Gain: 22dB

Input: 1 Pair RCA/Phono Sockets

Input Sensitivity: 1V

Input Impedance: 47kΩ

Speaker Connectors: Gold-Plated Terminals For 4mm Ø Banana Plugs, Spades Or Naked Wire

Trigger: 12V DC Switching Voltage

Trigger In/Out: 2-Pole 2.5mm Ø Co-Axial Jack

Outboard PSU: 20V/3A DC (Peak 7A DC)

Standby Power: < 1W

Dimensions (W x H x D): 103 x 36 x 104mm

Weight: 670g (Without PSU)

Product Code: Amp Box S

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Amp Box S

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