© Pro-Ject Audio Systems · Pro-Ject Phono Box DS3 B · Revision 2021.10.27
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Examples:
Ortofon 2M Red (MM):
Input impedance 47kohms, Input capacitance 147pF, Input gain 40dB
Ortofon X5-MC (High-Output MC):
Input impedance 47kohms, Input capacitance 367pF, Input gain 40dB
Ortofon Quintet Red (Low-Output MC):
Input impedance 50 ohms (Set Loading Ohms to variable & set 50 ohms with the rotary encoder), Input
capacitance - Any setting (not relevant for low-output MC), Input gain 60dB
Subsonic
The push button turns the subsonic filter on and off. The LED shows that the filter is turned on.
Technical specifications Pro-Ject Phono Box DS3 B
Input impedance:
Stepless 10
–
1000 ohms or fix 47 kohms
Input capacitance:
50, 150, 300, 400pF
Gain (+6dB using XLR Out):
40, 45, 50, 55, 60, 65dB
Signal / Noise ratio MM (40dB):
104dBV, 111dBV - 'A' weighted
Signal / Noise ratio 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 curve 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 sockets
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
Power supply DC:
18V/500mA
Power consumption:
18V/290mA DC, <0.5 W in standby
Dimensions:
206 x 70 x 194 (205 with sockets) mm (W x H x D)
Weight:
1480g without power supply
Potential incorrect use and fault conditions
No signal on one or both channels:
No connection between player and phono amplifier or amplifier. This could be due to a faulty plug, broken
wire or solder joint or simply loose plug/socket connection.
Strong hum:
No earth connection from cartridge or arm, or arm cable to phono amplifier, or earth loop.
Output too quiet or too loud, or distorted:
Input gain incorrectly set - input overloading or insufficiently amplified.
