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Pro-Ject Phono Box DS3 B Phonostage

Pro-Ject Phono Box DS3 B Phonostage

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Regular price $799 In stock now!
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Pro-Ject Phono Box DS3 B Balanced Phonostage

A true balanced, dual mono, fully discrete phonostage.

The Phono Box DS3 B is housed in a steel chassis enveloped by aluminum panels. This construction offers very high rigidity and isolation against interference, which is essential for the new technology inside. Magnetic wooden side panels are available separately as add-ons.

You can connect up to two turntables simultaneously, and all parameters for each input are stored in memory. Perfectly match the Phono Box DS3 B to a wide variety of cartridges. Load impedance can be set continuously via a potentiometer, a system invented by Pro-Ject Audio Systems, to adjust the impedance during playback and assess the impact of different loading options in real time.

Cartridges are balanced signal transducers by nature, and MC cartridges allow you to access the entirety of that balanced signal. Together with Pro-Ject's new True Balanced Connection cables you'll be able to access high-end features that were previously only available on the most expensive phono stages. 

The Phono Box DS3 B incorporates a true, fully balanced gain stage design. Whether you're using a single-ended RCA or balanced connection, both times the fully symmetrical gain stage can optimize the signal-to-noise ratios, feeding the fully passive and discrete RIAA equalization stage with the cleanest signal to work its magic on. Entirely split passive equalization allows for better impedance matching and lower deviation from the ideal RIAA curve. The Phono Box DS3 B uses fully discrete audio circuitry. Years of experience have proven that even the best op-amps do not come close to the neutral, natural, dynamic, and vivid presentations of discrete circuit.

Connect your turntable via the 5-pin mini XLR cable or standard XLR cables and enjoy the benefits of the new True Balanced Connection. A truly balanced gain stage can extract the final musical information, effectively filtering out any noise from interference stemming from our noisy, modern homes.


Input Impedance: Stepless 10 – 1000 ohm or fix 47 kOhm

Input Capacitance: 50, 150, 300, 400 pF

Gain (+ 6dB using XLR output): 40, 45, 50, 55, 60, 65 dB

Subsonic Filter: At 20 Hz with 18 dB/octave

Inputs: 1 x 5-pin mini XLR, 1 x stereo XLR, 1 x stereo RCA

Outputs: 1 x stereo RCA, 1 x stereo XLR

Power Supply: 18 V/500 mA DC

Dimensions: 8" x 2.8" x 7.6" (206 x 72 x 194 mm)

Weight: 3.26 lb.