Log in with PayPal
- Available
- Free shipping
- 1yr Manufacturer Warranty
- 5% Price Promise
Pro-Ject Phono Box S3 B Balanced MM/MC Phono Preamplifier BLACK
The Pro-Ject Phono Box S3 B is a compact audiophile phono stage designed for vinyl systems that demand low noise, precise cartridge matching, and balanced signal capability. Built around a fully symmetrical and discrete gain stage, it supports both Moving Magnet and Moving Coil cartridges while providing the flexibility needed for high-performance analog playback.
Its balanced architecture, dual mono design, and semi-passive RIAA equalization help preserve detail, reduce interference, and maintain clean, dynamic sound throughout the signal path. With front-panel adjustment for gain, loading, and input selection, the Phono Box S3 B makes it easy to fine-tune performance for a wide range of cartridges and turntable setups.
Features
- Compatible with both MM and MC cartridges
- Balanced 5-pin Mini XLR input
- Balanced XLR and single-ended RCA outputs
- Fully symmetrical and discrete gain stage
- Dual mono design for improved channel separation
- Semi-passive RIAA equalization
- Front-panel controls for easy settings adjustment
- Selectable gain and cartridge loading
- Subsonic filter to reduce unwanted low-frequency rumble
- Low-noise, low-distortion performance
- Aluminum casing for shielding against interference
- Made in Europe
Specifications
General
- Product Type: Phono preamplifier
- Cartridge Compatibility: MM and MC
- Amplifier Design: Fully symmetrical, discrete, dual mono
- RIAA Equalization: Semi-passive
- Subsonic Filter: Yes, 20Hz at 18dB/octave
- Finish: Black
- Country of Manufacture: Europe
Inputs & Outputs
- Inputs: 1 x 5-pin Mini XLR, 1 x pair RCA phono sockets
- Outputs: 1 x pair RCA, 1 x pair XLR
Cartridge Loading
- Input Impedance: 10, 50, 100, 1k, 47k ohms
- Input Capacitance: 50, 150, 300, 400 pF
Audio Performance
- Gain: 40, 45, 60, 65 dB
- Additional Gain via XLR Output: +6dB
- Signal-to-Noise Ratio MM (40dB): 103dBV, 110dBV A-weighted
- Signal-to-Noise Ratio MC (60dB): 85dBV, 90dBV A-weighted
- THD at 1kHz: <0.001% MM, <0.005% MC
- THD at 20Hz to 20kHz: <0.008% MM, <0.01% MC
- RIAA Equalization Accuracy: <0.3dB from 20Hz to 20kHz
Power
- Power Supply: 18V / 500mA DC
- Power Consumption: 18V / 170mA DC
- Standby Power Consumption: <0.5W
Dimensions & Weight
- Dimensions: 206 x 55 x 153 mm
- Dimensions with Sockets: 164 mm depth
- Weight: 0.93 kg
What’s in the Box
- Pro-Ject Phono Box S3 B phono preamplifier
- Power supply
- User documentation
Product Details
- Pro-Ject PJ97829283
-
Brand New : Factory Sealed
- EAN : 9120097829283
- EFLC : 16463
- Write a review
Warranty
One Year Warranty
- Parts and Labour Warranty
- Canada-wide Coverage
- Pro-Ject Authorized
Returns
Easy Returns
- 30-day return window on eligible items
- Full refund issued in accordance with our return policy
About Pro-Ject
Pro-Ject focuses on sound-first products built for music and home theater listening, where clarity, balance, and real-world usability matter. We've been carrying Pro-Ject since 2016.
Explore our current Pro-Ject selection and best sellers. We offer both new and open-box items, and everything is clearly marked. Popular categories include Turntables, Product Hardware & Accessories, Phono Preamps.
Featured Pro-Ject Products
Pro-ject Acryl It Platter Upgrade for Debut and Xpression
Model: PJ07685855
In stock
Pro-ject Phono Box S2 Ultra Phono Box S2 Ultra Discrete MM/MC Phono Preamplifier BLACK
Model: PJ82382120
In stock
Pro-ject PJ71658588 Tube Box S2 Phono Preamplifier BLACK
Model: PJ71658588
In stock
Pro-Ject PJ22291672 Automat A1 Automatic Turntable BLACK
Model: Automat A1
In stock
Pro-Ject Debut Sub-platter Upgrade for the Debut Turntable Line
Model: PJ97826480
In stock
Pro-Ject Debut Carbon EVO Turntable WALNUT
Model: Debut Carbon EVO
In stock
