Pro-Ject Tube Box DS2 Tube Phono Preamplifier

Dual mono · Replaceable tubes · Dual input and dual output · Warm musicality

The Pro-Ject Tube Box DS2 is a tube phono preamplifier in the DS series, featuring a dual-mono design with two ECC83 (12AX7) tubes, delivering a rich, warm, and musical sound. It supports both MM and MC cartridges, and is equipped with two phono inputs and two line outputs. Gain, impedance, and capacitance can be adjusted directly from the front panel, allowing for almost perfect matching with most cartridges on the market.

With its exquisite design and complete functionality, it is an ideal choice for those looking to experience the true charm of tube sound.

Basic Product Information

• Type: Tube MM / MC Phono Preamplifier
• Tubes: 2 × ECC83 (12AX7), replaceable
• Supported Cartridges: MM (Moving Magnet) and MC (Moving Coil)
• Input / Output: Dual RCA phono input + Dual RCA line output
• Adjustment Method: Direct adjustment via front panel buttons and knobs
• Color: Black or Silver (optional magnetic wooden side panels available)
• Origin: Hand-made in Europe
• Accessories: External 18V DC power supply

Core Technology Highlights

• Dual Mono Design: Excellent channel separation and soundstage performance
• Tube Output Stage: 2 ECC83 tubes provide warm, rich musicality
• Front Panel Direct Adjustment: One-touch setting of gain, impedance, and capacitance
• Continuously Adjustable MC Impedance: 10–1000Ω knob adjustment, fine-tunable during playback
• Adjustable Gain: 40 / 45 / 50 / 60 / 65 dB
• Adjustable Capacitance: 100 / 220 / 320 pF
• Switchable Subsonic Filter: 20Hz / 18dB/octave
• Dual Input and Dual Output: Can connect two turntables simultaneously with independent outputs
• Aluminum Alloy / Metal Sandwich Chassis: Effectively shields against vibration and electromagnetic interference
• Trigger Function: Convenient for system linkage and power on/off

Detailed Specifications

• Tubes: 2 × ECC83 (12AX7)
• Input Impedance: Continuously adjustable 10–1000Ω or fixed 47kΩ
• Input Capacitance: 100 / 220 / 320 pF
• Gain: 40 / 45 / 50 / 60 / 65 dB
• Signal-to-Noise Ratio: 88 dBA (40dB gain)
• Total Harmonic Distortion: <0.04%
• RIAA Accuracy: 20Hz–20kHz / ±0.2dB
• Subsonic Filter: 20Hz / 18dB/octave
• Inputs: 2 RCA pairs
• Outputs: 2 RCA pairs
• Power: External 18V / 1000mA DC
• Power Consumption: Max approx. 490mA (standby <0.5W)
• Dimensions: 206 × 91 × 227 mm (aluminum version)
• Weight: Approx. 1.5 kg (without power supply)

Sound Quality and Performance

The Tube Box DS2 delivers the warm, rich, and relaxed sound typical of tube phono stages. The midrange is particularly smooth and full-bodied, with excellent vocal and instrument textures. The soundstage is open and spacious, and dynamics are stable without being overbearing. The background is relatively quiet, with sufficient detail, presenting an overall easy-to-listen, enjoyable, and musically engaging performance.

Its dual inputs and adjustable loading allow for flexible pairing with different turntables and cartridges, making it a highly attractive choice for those entering a high-end tube system.

Online Reviews

• Hi-Fi News: Warm and full-bodied sound, excellent sense of space, complete functionality, a sweet-spot tube phono stage.
• Users and Media: Rich and natural midrange, good dynamics and musicality, convenient front panel adjustments, suitable for users seeking the charm of tube sound.
• Many reviewers praise its "warm yet clear sound, combining detail with musicality," noting its ability to significantly enhance the listening pleasure of a vinyl system.