Pro-Ject MC Step Up Box DS3 B – Balanced MC Step-Up Transformer for Turntables

The Pro-Ject MC Step Up Box DS3 B is a high-end step-up transformer designed specifically for low-output moving coil (MC) cartridges, delivering exceptional signal amplification while preserving musical detail and purity.

Unlike active gain stages, this step-up transformer provides a purely passive signal path, ensuring ultra-low noise and maximum signal integrity. It is the ideal solution for audiophiles seeking the most natural and transparent vinyl playback.

Thanks to its fully balanced design and high-quality internal transformers, the DS3 B guarantees superior channel separation, improved dynamics and a more refined soundstage.

Perfectly matched with high-end phono stages, this unit enhances low-output MC cartridges by boosting the signal level without introducing distortion or coloration.

Key Features

• High-end step-up transformer for MC cartridges
• Fully passive signal amplification (no active circuitry)
• Designed for low-output moving coil cartridges
• Fully balanced operation
• High-quality internal transformers for optimal signal transfer
• Ultra-low noise performance
• Improved channel separation and soundstage
• Balanced XLR inputs and outputs
• RCA inputs and outputs available
• Solid aluminum chassis for shielding
• Compact design
• Made in Europe

Why Buy the Pro-Ject MC Step Up Box DS3 B

Pure analog signal path

Being a passive device, it avoids active amplification stages, preserving the original character of your cartridge with maximum transparency.

Perfect match for low-output MC cartridges

Provides the correct gain level required by moving coil cartridges, making it easier to pair with MM phono stages.

Balanced audio performance

The fully balanced architecture ensures lower noise, better dynamics and superior channel separation.

Enhanced vinyl playback quality

Improves detail retrieval, micro-dynamics and overall realism, delivering a more engaging listening experience.

High-end system integration

Ideal for pairing with premium turntables and phono preamps in audiophile-grade systems.

Premium build quality

The robust aluminum enclosure protects against interference and ensures long-term durability.

Technical Specifications

General

• Type: MC step-up transformer
• Design: Passive, transformer-based
• Compatibility: Low-output moving coil cartridges

Gain & Impedance

• Gain: selectable (depending on configuration)
• Input impedance: optimized for MC cartridges

Inputs

• 1 x XLR balanced input
• 1 x RCA input

Outputs

• 1 x XLR balanced output
• 1 x RCA output

Construction

• Chassis: aluminum
• Shielding: high resistance to electromagnetic interference

Power

• Passive device (no power supply required)

Dimensions & Weight

• Dimensions (W x H x D): approx. 206 x 72 x 200 mm
• Weight: approx. 1.5 kg