Pro-Ject DS3 Phono Preamplifier

Electrical Disclaimer Further Information

Project Phono Box DS3.

Purchased new in June 2023 & has proven to be an excellent phono stage. 
Plenty of adjustability to suit a variety of cartridges & is in as new condition, with original shipping carton.

The Phono Box DS3 incorporates a fully balanced gain stage design. Whether you're using a single-ended RCA or balanced connection, the fully symmetrical gain stage can optimise 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. 

Elsewhere, the Phono Box DS3 uses fully discrete audio circuitry. A discrete circuit is composed of disparate, individual electronic components, also called discrete components. 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 circuitry.

Presents as brand new.

I have the original shipping carton, so shipping is not a problem.

Balanced XLR in- & outputs 
5-pin mini XLR balanced input.
NO Op-amps!
MM & MC capable 

Balanced & single ended in- & outputs

Dual mono design 

Continuously variable input impedance loading 
Most precise MC cartridge matching 
Superior low noise / low distortion 

Trigger in- & output 
Heavy aluminium casing protects against interference

Made in Europe 



SPECS:

Input impedance: Stepless 10 – 1000 ohms or fixed 47kOhms
Input capacitance: 50, 150, 300, 400pF
Gain (+ 6dB using XLR Out): 40, 45, 50, 55, 60, 65 dB
SNR MM (40dB): 104dBV, 111dBV - ‚A‘ weighted
SNR MC (60dB): 85dBV, 91dBV - ‚A‘ weighted

THD at 1 kHz: <0,001% MM, < 0,004%
MC
THD (20Hz-20kHz): <0,005%, MM, < 0,01% MC
RIAA-equalization accuracy: < 0,25dB / 20Hz – 20kHz
Subsonic filter: at 20Hz with 18dB/octave

Input: 1x 5-pin mini XLR / 1x pair XLR / 1x pair RCA phono Line-level output: 1x pair RCA, 1x pair XLR 
Wiring XLR sockets: 1 ground, 2 “hot” and 3 “cold” Trigger In/Out: 12V on/off detector

Outboard power supply: 18V/500mA DC 
Power consumption: 18V/max.290mA DC, <0.5 W standby

Dimensions: 206 x 72 x 194 (205 with sockets) mm