Phono Box S3 B
Pro-Ject Scortha

Phono Box S3 B

Entry-level phono preamplifier with a fully balanced, discrete gain stage in a steel and aluminium case. It suits vinyl listeners who want adjustable MM/MC loading and balanced connection, including for two turntables.

  • True balanced input via 5-pin mini XLR plus RCA input
  • Fully discrete, symmetrical gain stage without ICs
  • Two turntable inputs with stored settings
  • Gain 40, 45, 60 or 65 dB; loading 10 ohms to 47k ohms
  • RCA and XLR line outputs
  • Steel and aluminium case; silver or black
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Cur síos

The Phono Box S3 B is a compact phono stage built around a fully discrete, symmetrical gain stage with no integrated circuits in the amplifier section. A semi-passive RIAA equalisation stage follows it. The steel and aluminium housing gives rigidity and shielding against outside interference.

Two turntables can be connected at once, and the settings for each input are stored in memory. Input impedance, input capacitance and gain are adjustable from the front panel, which allows matching to many MM and MC cartridges. The gain range also lets the unit serve other sources such as CD players or streaming devices.

For the balanced signal path, a turntable is connected through a 5-pin mini XLR cable. An RCA input pair is also provided. Outputs are one pair of RCA and one pair of XLR. Because of how MM cartridges are wired internally, an MC cartridge is needed to use the full balanced signal. It is available in silver or black and is made in Europe.

Físeán

Sonraíochtaí

Branda
Pro-Ject
Samhail
Phono Box S3 B
Catagóir
Hi-Fi agus fuaim an tí › Hi-Fi eile

Inputs

Input
1x 5-pin mini XLR / 1x pair RCA phono sockets
Input impedance
10, 50, 100, 1k, 47k ohms
Input capacitance
50, 150, 300, 400 pF

Outputs

Line-level output
1x pair RCA, 1x pair XLR

Audio

Gain (+ 6dB using XLR Out sockets)
40, 45, 60, 65 dB
Signal / Noise ratio MM (40dB)
103dBV, 110dBV - 'A' weighted
Signal / Noise ratio MC (60dB)
85dBV, 90dBV - 'A' weighted
THD at 1 kHz
<0,001% MM, < 0,005% MC
THD (20Hz-20kHz)
<0,008% MM, < 0,01% MC
RIAA-equalization curve accuracy
<0,3dB / 20Hz - 20kHz
Subsonic filter
at 20Hz with 18dB/octave

Power

Power supply DC
18V/500mA
Power consumption
18V/170mA DC, <0.5 W in standby

Physical

Dimensions (W x H x D)
206 x 55 x 153 (164 with sockets) mm
Weight
930g without power supply
Case
Steel and aluminium
Colours
Silver, Black

Doiciméid

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Sonraí: project-audio.com; grianghraif: Pro-Ject product page · nuashonraithe 2026-10-11 · Botún aimsithe? Scríobh chugainn