THE NEW PHONO BOX S3 B

The Phono Box S3 B is an entry-level phono preamplifier that offers a fully balanced design in a neat, small package. We’ve packed this tiny chassis to the brim with high-end features. One of those is our new True Balanced Connection. At Pro-Ject, balanced connections were exclusive to our RS range of products until now. The Phono Box S3 B brings those features to an incredible new entry level.

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.

Balanced By Nature

Cartridges are balanced signal transducers by nature! Due to the internal wiring of MM cartridges, you'll need to upgrade your turntable with an MC cartridge to access the entirety of that balanced signal. Together with our new True Balanced Connection cables you'll be able to access high-end features that were previously only available on the most expensive of phono stages. And the best of all: any Pro-Ject turntable with RCA, miniXLR or 5P outputs can do it!

FULLY DISCRETE AND SYMMETRICAL GAIN STAGE

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 optimize 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).

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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

Phono Box S3 B Entry-Level True Balanced Phono Stage Black

THE NEW PHONO BOX S3 B

True High-End For the New Entry-Level

Balanced By Nature

FULLY DISCRETE AND SYMMETRICAL GAIN STAGE

TRUE BALANCED CONNECTION