# Pro-Ject Phono Box S3 B: specs and price

**Price (US):** Not published (US MSRP not published on the manufacturer's product page as fetched; check authorized US dealers for current pricing), as of 2026-08-12.
**Brand:** Pro-Ject Audio Systems

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | Not published |
| Brand | Pro-Ject Audio Systems |
| Cartridge support | MM and MC |
| Gain (dB) | 40/45/60/65 dB, plus an additional +6 dB available via the balanced XLR outputs |
| Snr (dB) | MM: 103/110 dB(A); MC: 85/90 dB(A) |
| Riaa accuracy | <0.3 dB (20 Hz - 20 kHz) |
| Input capacitance pf | 50/150/300/400 pF selectable |
| Subsonic filter | 20 Hz, 18 dB/octave rolloff |
| Thd percent | MM: <0.001% @1kHz, <0.008% 20Hz-20kHz; MC: <0.005% @1kHz, <0.01% 20Hz-20kHz |
| Output level | Balanced XLR and single-ended RCA outputs |

## Frequently asked questions

**How much does the Pro-Ject Phono Box S3 B cost?**

The Pro-Ject Phono Box S3 B has no published US price as of 2026-08-12.

**What are the Pro-Ject Phono Box S3 B's key specs?**

Pro-Ject Phono Box S3 B (Pro-Ject Audio Systems): cartridge support MM and MC, gain db 40/45/60/65 dB, plus an additional +6 dB available via the balanced XLR outputs, snr db MM: 103/110 dB(A); MC: 85/90 dB(A), riaa accuracy <0.3 dB (20 Hz - 20 kHz), input capacitance pf 50/150/300/400 pF selectable. Full sourced spec sheet verified 2026-08-12.

Source: https://www.project-audio.com/en/product/phono-box-s3-b/ (project-audio.com, accessed 2026-08-12)
Canonical: https://frontdeskreview.com/product/phono-preamps/pro-ject-phono-box-s3-b/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl