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Category: Pre-Amplifiers

Pro-Ject Phono Box S3B - Balanced Phono Preamplifier (Black)

Key Features

Balanced Design

  • Fully balanced audio path from input to output, reducing noise and interference.

  • Balanced outputs allow connection to amplifiers or preamps with XLR inputs for optimal signal integrity.

  • Balanced design improves dynamic range and lowers noise floor compared with unbalanced stages.

MM and MC Cartridge Support

  • Supports moving-magnet and moving-coil cartridges with dedicated settings.

  • Adjustable gain and loading options for precise matching with a wide range of cartridges.

  • Helps extract maximum performance from higher-end MC cartridges.

Flexible Gain and Loading Controls

  • Adjustable gain lets you set the preamp for different cartridge sensitivities.

  • Variable loading for MC cartridges tailors electrical characteristics to specific models.

  • Ensures optimal cartridge performance without harshness or distortion.

Accurate RIAA Equalisation

  • Precision RIAA curve correction ensures faithful reproduction of vinyl recordings.

  • Smooth tonal balance with natural midrange and clear treble.

Multiple Output Options

  • Balanced XLR outputs provide professional-level connectivity to compatible amplifiers.

  • Unbalanced RCA outputs ensure compatibility with a wide range of systems.

Premium Build Quality

  • Solid, compact chassis finished in black.

  • Robust construction designed for reliable performance and low vibration.

Description

Pro-Ject Phono Box S3B – Balanced Phono Preamplifier (Black)

True Balanced Design
Engineered with fully balanced circuitry for MM and MC cartridges, the Phono Box S3B delivers cleaner, quieter, and more dynamic sound.

Fully Adjustable Settings
Fine-tune your listening experience with adjustable gain, capacitance, and impedance for perfect cartridge matching.

Ultra-Low Noise Performance
High-grade components and a dual-mono layout minimise crosstalk and preserve maximum detail from your vinyl collection.

XLR and RCA Connectivity
Offers balanced XLR outputs and standard RCA outputs for ultimate flexibility in any hi-fi system.

External Power Supply
Isolated DC power supply ensures clean power delivery, eliminating unwanted interference.

Compact, Rigid Chassis
Precision metal enclosure shields the electronics from vibrations and electromagnetic interference.

Elegant Black Finish
Sleek and professional design that seamlessly integrates into modern audio systems.

 

Specification Details
Brand Pro‑Ject
Model Phono Box S3 B
Device Type Balanced MM/MC Phono Preamplifier
Inputs 1 × RCA Stereo Pair, 1 × Balanced XLR5
Outputs 1 × RCA Stereo Pair, 1 × Balanced XLR Pair
Supported Cartridges Moving Magnet (MM) & Moving Coil (MC)
Gain Settings 40 dB / 45 dB / 60 dB / 65 dB
Input Impedance 10 Ω – 47 kΩ (Adjustable)
Capacitance Settings 50 pF / 150 pF / 300 pF
Subsonic Filter Yes (20 Hz, 12 dB/octave)
THD + Noise < 0.01% @ 1 kHz
Signal-to-Noise Ratio 89 dB (MM) / 80 dB (MC)
Power Supply 18 V DC Power Adapter (Included)
Finish Matte Black Aluminium
Dimensions (HxWxD) 56 × 206 × 153 mm
Weight 0.9 kg
Accessories Included Power Supply Adapter, Ground Cable, User Manual
Warranty 2 Years Manufacturer Warranty

 

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