Pro-Ject Tube Box S3 B – New MM/MC Tube Phonostage
06.08.2025 08:49 | ~1 minute read
Pro-Ject has released a new balanced tube phono preamplifier Pro-Ject Tube Box S3 B. Despite its modest dimensions, the model is equipped with both RCA and mini-XLR inputs, as well as XLR and RCA outputs – so integration into a balanced path will be ideal.
The Pro-Ject Tube Box S3 B phonostage is made using the “dual mono” topology, the circuit of the device uses only discrete components, and the RIAA correction circuit is made semi-passive to eliminate phase and frequency distortions. The Pro-Ject Tube Box S3 B case is made of metal and shields the circuitry from external interference and noise.
The use of lamps in the Pro-Ject Tube Box S3 B promises a natural and harmonious sound and the switchable Subsonic filter allows you to level out the background in systems with complex wiring of the ground wire. Full specs coming soon.
Image source - (c) Pro-Ject
Specifications
This product is in the Hi-Fi and High End Electronics and Acoustics database
Phonostages — Pro-Ject Tube Box S3 B
Model name
Tube Box S3 B
Inputs (balanced)
N/A
Inputs (single-ended)
N/A
MC current-sensing input impedance (Ω)
N/A
MM/MC voltage input impedance (Ω)
N/A
Output impedance (Ω)
N/A
Gain (dB)
N/A
Playback EQ curves accuracy (dB)
N/A
Frequency response low +/- 3dB (Hz)
N/A
Frequency response high +/- 3dB (Hz)
N/A
Total Harmonic Distortion + Noise (%)
N/A
Dimensions (mm)
N/A
Weight (kg)
N/A
Official link
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