

Pro-Ject Phono Box S3 B Review: A Balanced Masterpiece at an Unbeatable Price
In this Pro-Ject Phono Box S3 B review, we're diving deep into what could be the most significant phono stage release of the year. As an audiophile-grade fully balanced phono preamplifier, this compact marvel brings technology previously reserved for Pro-Ject's high-end RS range to a broader audience.
First Impressions and Build Quality
The moment you lay eyes on the S3 B, its premium construction is evident. The completely redesigned steel and aluminium chassis isn't just about aesthetics - it's a carefully engineered solution for superior rigidity and interference isolation. Available in both black and silver finishes, it maintains a sophisticated presence while remaining remarkably compact.
Technical Excellence
What sets the Phono Box S3 B apart is its implementation of True Balanced Connection technology. This isn't just marketing speak - it's a genuine game-changer for signal integrity. The fully discrete and symmetrical gain stage utilises individual components rather than integrated circuits, resulting in unprecedented signal purity.
Key Technical Specifications:
- Multiple gain settings: 40, 45, 60, 65 dB (+6dB using XLR outputs)
- Impressive signal-to-noise ratios: up to 110dBV ('A' weighted) for MM cartridges
- Exceptionally low THD: <0.001% MM, <0.005% MC
- Versatile input impedance options: 10, 50, 100, 1k, 47k ohms
- RIAA equalisation accuracy: <0.3dB from 20Hz to 20kHz
Sound Quality
The sonic performance of the S3 B is nothing short of remarkable. The balanced design contributes to a noticeably lower noise floor, while the discrete gain stage delivers a level of detail retrieval that's usually reserved for much more expensive units. The soundstage is wide and precise, with excellent channel separation thanks to the true balanced topology.
Practical Features and Flexibility
The S3 B offers extensive adjustment capabilities to optimise performance with virtually any cartridge:
- Multiple impedance settings
- Adjustable capacitance (50-400 pF)
- Subsonic filter (20Hz, 18dB/octave)
- Both RCA and XLR outputs
Pros and Cons
Pros:
- True balanced topology at an accessible price point
- Exceptional build quality with premium materials
- Remarkably low noise floor
- Extensive cartridge matching options
- Compact form factor
- Energy-efficient design (<0.5W standby)
- Both single-ended and balanced outputs
Cons:
- Requires balanced cables for optimal performance
- Premium price compared to entry-level phono stages
- May be over-specified for basic setups
Perfect For Your System?
If you're wondering whether the Phono Box S3 B is the right choice for your setup, our team at The Audio Tailor would love to chat about your specific needs. Give us a ring on 1300 308 711 for personalised advice on integrating this exceptional phono stage into your system.
A New Reference Point in Phono Preamplification
The Pro-Ject Phono Box S3 B represents a significant step forward in affordable high-end audio. It brings previously exclusive technology to a broader audience without compromising on quality or features. For vinyl enthusiasts looking to extract the absolute maximum from their records, this phono stage demands serious consideration.
Want to learn more about how this phenomenal phono stage could transform your vinyl listening experience? Our team of vinyl enthusiasts would love to share their insights - just give us a call to discuss your specific setup and requirements.
