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Based on price data from 1 merchant for "Pro-Ject Phono Box S3 B Balanced MM/MC Phono Preamp". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.
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Description
Delve into the world of high-fidelity audio with the Pro-Ject Phono Box S3 B Balanced MM/MC Phono Preamp, a gateway to true sonic excellence. Engineered for both budding audiophiles and seasoned vinyl enthusiasts, this preamp offers a fully balanced design that elevates your vinyl experience to new heights. The Pro-Ject Phono Box S3 B is a marvel of meticulous engineering, featuring a symmetrical gain stage and semi-passive RIAA equalization for hyper-accurate frequency reproduction with minimal noise and distortion.
The Phono Box S3 B excels in its dual-mono design, ensuring maximum channel separation, which offers a pristine audio path. Its fully discrete audio circuitry eliminates the need for integrated circuits, providing an ultra-clean signal for your turntable. Designed to accommodate both moving magnet and moving coil cartridges, this preamp offers selectable gain and switchable input impedance loading, giving you the flexibility to tailor your sound.
Wrapped in a robust steel chassis with aluminum panels, the Phono Box S3 B not only looks striking but also provides excellent protection against interference. With a subsonic filter to eliminate unwanted rumble, your listening experience remains uninterrupted and clear. Elevate your analog journey with the Pro-Ject Phono Box S3 B and explore the depths of true balanced audio.
Key Features:
- Fully balanced design with XLR connectors for superior noise rejection
- Symmetrical gain stage for optimal signal-to-noise ratio
- Semi-passive RIAA equalization for accurate frequency reproduction
- Fully discrete audio circuitry for low noise and distortion
- Dual-mono design for maximum channel separation
- Compatible with moving magnet and moving coil cartridges
- Selectable gain and switchable input impedance loading
- 20Hz subsonic filter to eliminate low-frequency rumble
- Heavy aluminum casing for robust interference protection
Product specs
| Preamp Type | True Balanced Phono Preamplifier, Black |
| Number of Channels | Dual Mono |
| EQ | RIAA (semi-passive) |
| Analog Inputs | 1 x 5-pin Mini-XLR, 1 x Dual RCA Phono (MM/MC) |
| Analog Outputs | 2 x XLR, 1 x Dual RCA Phono |
| Frequency Response | 20Hz to 20kHz |
| Power Source | 18V/500mA DC Power Supply (included) |
| Height | 2.16" |
| Depth | 8.11" |
| Width | 6.02" |
| Weight | 2.05 lbs |
FAQs
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What types of cartridges is the Pro-Ject Phono Box S3 B compatible with?
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The Pro-Ject Phono Box S3 B is compatible with both Moving Magnet (MM) and Moving Coil (MC) cartridges, making it versatile for various turntable setups.
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What is the benefit of the true balanced design in the Pro-Ject Phono Box S3 B?
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The true balanced design helps reduce noise and interference, providing a cleaner, more detailed sound, especially important for high-fidelity audio systems.
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What are the main input and output options on the Pro-Ject Phono Box S3 B?
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The Pro-Ject Phono Box S3 B features 1 x 5-pin Mini-XLR and 1 x Dual RCA Phono for inputs, and 2 x XLR and 1 x Dual RCA Phono for outputs, offering flexible connectivity options.
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Does the Pro-Ject Phono Box S3 B include a power supply?
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Yes, the Pro-Ject Phono Box S3 B comes with an 18V/500mA DC power supply, ensuring it's ready to use out of the box.
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What is the frequency response range of the Pro-Ject Phono Box S3 B?
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The frequency response of the Pro-Ject Phono Box S3 B is 20Hz to 20kHz, covering the full range of human hearing for accurate audio reproduction.
Videos
hxos plus
The most inexpensive Balanced phono stage in the market 2022 | Pro-Ject Phono Box S3 B
Reviews
PROS
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Seamless integration with Pro-Ject turntables, enhancing audio performance
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Offers clear, dynamic sound with more sound color than integrated preamps
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Front push button selections for convenient settings adjustments
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Supports both MM and MC cartridges with ease
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Full balanced audio connection capability for a higher fidelity experience
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Considered an "end-game" phono stage for many, despite mid-range marketing
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Easy to install with versatile cartridge support
CONS
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More expensive compared to some competitors like the Parasound zphono
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Lacks the deeper bass and wider soundstage compared to some alternatives
Owner Insights
We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Pro-Ject Phono Box S3 B Balanced MM/MC Phono Preamp.
Features and functionality
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The Pro-Ject Phono Box S3 B includes RCA connectors, offering flexibility beyond its balanced inputs for various user setups.
Source
Comparisons
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The Pro-Ject Phono Box S3 B is noted for flexibility and ease of use but is considered less price-competitive compared to options like the iFi Zen Phono if balanced I/O isn't needed.
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Critic Reviews
Based on 0 Reviews and 0 Ratings
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