Pro-Ject Tube Box S3 Phono Stage (MM + MC)

Compact phono preamplifier with authentic tube sound and balanced technology. Adjustable gain and impedance, aluminum chassis and dual turntable support.

Starts at 603 EUR /pc.

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Highlights:

• Authentic tube sound with 2 x ECC83 tubes
• Fully balanced amplifier design with symmetrical signal path
• Adjustable impedance, capacitance and gain directly from the front panel
• Connect two turntables simultaneously with individual memory
• Subsonic filter for cleaner low-frequency performance
• Aluminum chassis for interference-free operation
• Made in Europe, available in black or silver

Audiophile tube warmth:

The Tube Box S3 B is an exclusive phono preamplifier that delivers the warm and dynamic sound only tubes can provide. With two ECC83 tubes and a fully symmetrical amplifier design, you achieve maximum signal purity and minimal noise. The balanced construction with 5-pin mini XLR input and XLR outputs ensures crystal-clear reproduction of even the most demanding vinyl recordings. Made in Europe with a focus on quality and durability, this compact preamplifier is a true high-end choice for any serious vinyl enthusiast.

Balanced precision:

The balanced design makes all the difference. With two separate amplifier sections for the + and - signal paths, noise is effectively eliminated, resulting in precise, distortion-free and detailed sound. Using the True Balanced Connection gives you access to a level of dynamics and detail normally only found in much more expensive solutions. The option to connect two turntables with individual memories makes setup both flexible and user-friendly.

Flexible adjustment:

With a gain range from 40 to 65 dB, impedance options as low as 10 ohms and capacitance settings from 50 to 400 pF, you can optimize playback for both MM and MC cartridges. The subsonic filter at 20 Hz removes unwanted low frequencies, providing cleaner and more precise sound. This makes the Tube Box S3 B one of the most versatile phono preamplifiers in its class.

Built to last:

The solid aluminum chassis protects against electromagnetic interference and ensures long-lasting performance. The combination of carefully crafted European engineering, high-quality components and replaceable tubes makes this an investment that will elevate your vinyl setup for years to come.

Specifications:

• Tubes: 2 x ECC83 (12AX7)
• Input impedance: 10, 50, 100, 1k, 47k Ohms
• Input capacitance: 50, 150, 300, 400 pF
• Gain: 40, 45, 60, 65 dB (+6 dB via XLR output)
• SNR MM (40 dB): 97 dBV, 105 dBV (A-weighted)
• SNR MC (60 dB): 83 dBV, 88 dBV (A-weighted)
• THD at 1 kHz: <0.005% MM, <0.01% MC
• THD (20 Hz-20 kHz): <0.1% MM, <0.03% MC
• RIAA accuracy: <0.4 dB / 20 Hz - 20 kHz
• Subsonic filter: 20 Hz, 18 dB/octave
• Inputs: 1 x 5-pin mini XLR, 1 x pair RCA phono
• Outputs: 1 x pair RCA, 1 x pair XLR
• Power supply: 18 V/1000 mA DC
• Power consumption: 18 V/800 mA DC, <0.5 W standby
• Dimensions (W x H x D): 206 x 81 x 153 mm (164 mm incl. sockets)
• Weight: 1010 g without power supply

Product reviews and links

Pro-Ject MM + MC spec sheet (EN)

PJT-TUBEBOXS3-B: Pro-Ject Tube Box S3 Phono Stage (MM + MC) | Black

PJT-TUBEBOXS3-S: Pro-Ject Tube Box S3 Phono Stage (MM + MC) | Silver

Brand description - Pro-Ject

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Manuals and user guides for Pro-Ject products

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