Pro-Ject Audio Phono Box S2 MM/MC Phono Preamplifier
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Pro-Ject Audio Phono Box S2 MM/MC Phono Preamplifier
Overview
The Pro-Ject Phono Box S2 is a step up from an entry-level phono preamp, built to match its gain, input impedance, and capacitance settings precisely to your MM or MC cartridge rather than offering a single fixed setting.
Dual-mono circuitry, audiophile-grade WIMA polypropylene capacitors, and precise RIAA equalization work together for a detailed, low-noise signal, while a switchable subsonic filter cuts rumble below 20Hz that can otherwise muddy the low end or stress your speakers.
Its aluminum/metal sandwich chassis shields the circuitry from vibration and electromagnetic interference, and is available in silver or black to match your system.
Simcoe Audio Video Insight
We recommend the Phono Box S2 for listeners who've outgrown a basic fixed-setting preamp and want to properly match gain and loading to a specific MM or MC cartridge, without stepping up to a full standalone phono stage.
More Info
Why the Phono Box S2 Stands Out
4 Switchable Gain Levels
40dB, 43dB, 60dB, or 63dB to match MM or MC output.
Switchable Input Impedance and Capacitance
Four settings each for precise cartridge loading.
Built-In Subsonic Filter
-12dB at 20Hz cuts rumble below the audible range.
Dual-Mono Circuitry
Separate channel paths for a wide, precise soundstage.
Audiophile-Grade Components
WIMA polypropylene capacitors throughout.
Shielded Aluminum/Metal Chassis
Protects circuitry from vibration and electromagnetic interference.
Silver or Black Finish
Matches either system aesthetic.
Buyer's Guide
Who It's For
- Owners Upgrading from a Fixed-Setting Preamp: adjustable gain, impedance, and capacitance dial in a specific cartridge properly.
- MM and MC Cartridge Owners Alike: covers both types without needing a separate step-up device.
- Listeners Bothered by Rumble: the built-in subsonic filter helps clean up low-frequency noise from warped records or footfall.
How It Compares
Pro-Ject's Phono Box MM covers MM and high-output MC cartridges at a fixed setting for a simpler, more affordable setup. The Phono Box S2 adds switchable gain, impedance, and capacitance plus a subsonic filter, making it the better choice for listeners who want to fine-tune the preamp to a specific cartridge rather than rely on one fixed configuration.
Pro-Ject Audio Phono Box S2 MM/MC Phono Preamplifier Specifications
| General Information | |
|---|---|
| Brand | Pro-Ject Audio Systems |
| Product Type | Phono Preamplifier |
| Finish | Silver or black |
| Cartridge Compatibility | |
| Supported Cartridges | MM and MC |
| Performance | |
| Input Impedance (switchable) | 10Ω / 100Ω / 1kΩ / 47kΩ |
| Input Capacitance (switchable) | 100pF / 200pF / 320pF / 420pF |
| Gain (switchable) | 40dB / 43dB / 60dB / 63dB |
| Subsonic Filter | -12dB @ 20Hz |
| Signal-to-Noise Ratio | 85dB |
| THD+N | 0.01% (MM) / 0.05% (MC) |
| RIAA Accuracy | <0.4dB, 20Hz-20kHz |
| Inputs & Outputs | |
| In/Out | 1 pair RCA connectors |
| Power | |
| Power Consumption | 18V / 85mA |
| Outboard Power Supply | 18V DC / 500mA |
| Physical Specifications | |
| Dimensions (W x H x D) | 4.06" x 1.42" x 4.53" (103 x 36 x 115mm) |
| Weight | 570g (1.26 lb) net |