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Pro-Ject Amp Box RS2 – Compact Power Amplifier

Pro-Ject has introduced a compact stereo power amplifier Pro-Ject Amp Box RS2. A distinctive feature of the new product is the use of a pair of vacuum tubes and the ability to switch the model to a bridged mode.

The Pro-Ject Amp Box RS2 power amplifier is built using a hybrid circuit - the preliminary amplification stage in each channel is implemented on a dual triode 6922 (6DJ8), and the solid-state output stages operate in the traditional class A / B and provide up to 2 x 80 W in each channel when working on a load with an impedance of 8 Ohms and 130 W for a load of 4 Ohms. In bridged mode, the amplifier is capable of developing up to 350 W at a load of 8 Ohms. The all-metal case of the amplifier is important for the distribution and dissipation of excess heat.

Pro-Ject Amp Box RS2
Pro-Ject Amp Box RS2. Image source - (c) Pro-Ject

The external power supply unit included with the Pro-Ject Amp Box RS2 amplifier allows for an upgrade to the more advanced Pro-Ject Power Box RS2 version with a larger toroidal transformer and a total filter capacity of 40,000 μF.

Pro-Ject Amp Box RS2
Pro-Ject Amp Box RS2. Image source - (c) Pro-Ject

The Pro-Ject Amp Box RS2 power amplifier is available in black or silver finishes. The recommended retail price is €1,799, and the additional Pro-Ject Power Box RS2 power supply unit will cost an additional €999.

Specifications

This product is in the Hi-Fi and High End Electronics and Acoustics database

Power amplifiers stereo — Pro-Ject Amp Box RS2

  • Model name

    Amp Box RS2

  • Input sensitivity (mV)

    N/A

  • Input impedance (balanced) (Ω)

    20000

  • Input impedance (single-ended) (Ω)

    47000

  • Output impedance (balanced) (Ω)

    N/A

  • Output impedance (single-ended) (Ω)

    N/A

  • Max current (A)

    N/A

  • Output power (8Ω) (W)

    2 x 80

  • Output power (4Ω) (W)

    2 x 130

  • Gain (dBu)

    27

  • Sensitivity (mV)

    N/A

  • Frequency response low +/- 3dB (Hz)

    20

  • Frequency response high +/- 3dB (Hz)

    20000

  • Signal to Noise Ratio (dB)

    97

  • Total Harmonic Distortion + Noise (0% global feedback) (%)

    N/A

  • Total Harmonic Distortion + Noise (100% global feedback) (%)

    0.08

  • Max power consumption (W)

    N/A

  • Damping factor

    N/A

  • Dimensions (mm)

    206 x 85 x 227

  • Weight (kg)

    2.66

  • Official link

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