The Phono Box S3 B is a phono preamplifier that offers a fully balanced design in a neat, small package. Pro-Ject have packed this tiny chassis to the brim with high-end features. One of those is their new True Balanced Connection. When used in combination with a Pro-Ject turntable with a 5-pin balanced output and 5P to XLR cable, you can achieve a totally balanced connection, minimising noise and delivering a breathtaking analogue signal.
Until now, balanced connections were exclusive to the RS range of products. The Phono Box S3 B brings those features to more affordable products.
True High-End For the New Entry-Level
Our Phono Box S3 B comes in complete new casework. The bigger size enabled us to bring a completely new feature set that was never seen before in this price range. The new steel & aluminium case also offers very high rigidity and isolation against outside interferences, which is essential for the new technology inside. Connect up to two turntables simultaneously – all parameters for each input get stored in the memory. You can perfectly match the Phono Box S3 B to a wide variety of cartridges. Use the gain setting to accurately match the output to other sources like CD players or streaming devices. Ultra-low values like 50 pF or 10 ohms allow you to account for all situations.
The new Phono Box S3 B gain stage uses a fully discrete layout. A discrete circuit is composed of disparate electronic components, and individual devices. The amplifier section is built of single parts and doesn‘t use any integrated circuits! That makes for an extended and more costly design process but results in the best sound quality. The fully symmetrical gain stage can optimise the signal-to-noise ratios, feeding the semi-passive, RIAA equalisation stage with a clean signal to work on.
True Balanced Connection
The symmetrical design is the fundamental standout feature! Connect your turntable via the 5-pin mini XLR cable and enjoy the benefits of a balanced signal path. A truly balanced gain stage can extract the final musical information, effectively filtering out any noise from interferences stemming from our noisy, modern homes (household appliances, wifi & Bluetooth, power cables, audio amplifiers).
|Input impedance:||10, 50, 100, 1k, 47k ohms|
|Input capacitance:||50, 150, 300, 400 pF|
|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|
|Input:||1x 5-pin mini XLR / 1x pair RCA phono sockets|
|Line-level output:||1x pair RCA, 1x pair XLR|
|Power supply DC:||18V/500mA|
|Power consumption:||18V/170mA DC, <0.5 W in standby|
|Dimensions:||206 x 55 x 153 (164 with sockets) mm (W x H x D)|
|Weight:||930g without power supply|