Tube Box S vs Phono Box S2
The Phono Box S2's signal-to-noise is 85 dB against the Tube Box S's 94 dB, its mc gain 60 dB against 61 dB, and its mm gain 40 dB against 41 dB. Both share thd (0.010%).
Both turn up in the same documented systems.
AI-generated product photo — not official manufacturer imagery.
AmplifiersPhono Pre-Amps
Estimated price (community-sourced)
$279
Around — community and catalog average, updates slowly
About the Tube Box S
The Pro-Ject Tube Box S is a dual-mono phono preamplifier designed for audiophile-grade vinyl playback. It features ECC83 (12AX7) vacuum tubes in a dual-mono configuration, delivering a warm, detailed sound signature with precise RIAA equalization (±0.4dB deviation). The unit offers adjustable input impedance (10Ω-2kΩ for MC/47kΩ for MM) and capacitance loading (50-370pF), along with three gain settings (41/51/61dB) to accommodate various cartridges.
Specifications
Analog Output
Analog signal output specifications
- THD
- 0.010%
- SNR
- 94 dB
- Output Voltage
- 18.0V RMS
- Output Impedance
- 10Ω
Phono Preamplifier
Phono stage specifications
- MM Gain
- 41 dB
- HOMC Gain
- 51 dB
- MC Gain
- 61 dB
- Adjustable Loading
- Yes
- Loading Options
- 10Ω, 100Ω, 1000Ω, 2000Ω
- Adjustable Capacitance
- Yes
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 103 × 74 × 137 mm (W × H × D)
- Weight
- 0.81 kg (2 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions