Pro‑Ject Phono Box RS2 – Fully Balanced Reference‑Class Phono Preamplifier

The Pro‑Ject Phono Box RS2 is a true reference‑grade phono preamplifier, designed for uncompromising vinyl playback. Built with a fully balanced, fully discrete signal path from input to output, it eliminates operational amplifiers in favor of carefully selected individual components for the purest possible sound. Featuring split passive RIAA and DECCA equalization, variable impedance loading, and switchable gain, the RS2 offers unparalleled versatility and sonic refinement for both MM and MC cartridges. This is Pro‑Ject’s ultimate phono stage for discerning audiophiles.

Key Features

• Fully balanced design: From input to output for superior noise rejection and dynamics
• Fully discrete circuitry: No op‑amps—only carefully selected individual components for natural, vivid sound
• Split passive RIAA and DECCA equalization: Delivers precise frequency response with low distortion
• Unique impedance control: Continuously variable from 10 Ω to 1 kΩ for perfect cartridge matching
• Flexible gain settings: Multiple gain options for MM and MC cartridges via RCA and XLR outputs
• Balanced and unbalanced I/O: RCA and XLR inputs and outputs for high‑end connectivity

Customer Benefits

The Phono Box RS2 is designed for vinyl enthusiasts who demand the very best from their analog systems. With fully adjustable impedance and gain, it accommodates a wide range of cartridges while maintaining a transparent, dynamic, and lifelike soundstage. Its robust construction and refined design ensure it will remain the heart of your vinyl playback chain for years to come.

Quick Specs

• Input impedance: Fixed 47 kΩ, variable 10 Ω – 1 kΩ
• Load capacity: 50, 100, 150, 200, 250, 300, 350, 400 pF
• Gain (MM): RCA: 40, 43, 46, 50 dB (+6 dB via XLR)
• Gain (MC): RCA: 60, 63, 66, 70 dB (+6 dB via XLR)
• Signal‑to‑noise ratio: MM (40 dB): 89 dB (A‑weighted, 10 mV); MC (60 dB): 79 dB (A‑weighted, 1 mV)
• THD: <0.0015 % (MM, 40 dB, 1 kHz); <0.0024 % (MC, 60 dB, 1 kHz)
• RIAA accuracy: ±0.4 dB (20 Hz – 20 kHz)
• Subsonic filter: 20 Hz, 18 dB/octave
• Inputs: RCA & XLR
• Outputs: RCA & XLR
• Power supply: 20 V / 3 A DC (included)
• Power consumption: 350 mA DC (<1 W standby)
• Dimensions: 20.6 × 7.2 × 20 cm (including sockets)
• Weight: 1.6 kg (without power supply)

What’s in the Box

• Pro‑Ject Phono Box RS2
• 20 V / 3 A DC power supply
• User manual

Use Cases / Ideal For

Perfect for high‑end vinyl systems where flexibility, precision, and fully balanced connectivity are essential. Ideal for audiophiles using advanced MM and MC cartridges seeking ultimate performance.

Pros & Cons

✅ Pros:

• Fully balanced, fully discrete design for reference‑grade sound
• Continuously variable impedance for precise cartridge matching
• Split passive RIAA and DECCA EQ for superior accuracy

⚠️ Cons:

• Premium pricing compared to entry‑level options
• Complex setup may require experience for optimal tuning

The Pro‑Ject Phono Box RS2 represents the pinnacle of Pro‑Ject’s phono preamp design, combining fully balanced circuitry, extensive adjustability, and reference‑grade sound quality for serious vinyl enthusiasts. Available now at Soundium.