© Pro-Ject Audio Systems · Pro-Ject Phono Box RS2 · Revision 2020.05.15
4
MM cartridges
The Phono Box RS2 operates in MM mode when one of the first four MM Gain settings are used.
Gain setting in 4 steps 40, 43, 46 and 50 dB
Capacitance in 8 steps from 50 to 400 pF
Impedance is fixed to 47kOhms in MM mode.
MC cartridges:
The Phono Box RS2 operates in MM mode when one of the second four MC Gain settings are used.
Gain setting in 4 steps 60, 63, 66 and 70 dB
Impedance setting is possible using the potentiometer from 10 Ohms to 1000 Ohms
Capacitance is fixed to 50 pF in MC mode.
To find out which type your cartridge is please consult the literature accompanying your cartridge. The literature
for cartridges should also specify the correct input impedance (low-output MC cartridges) and the correct input
capacitance (high-output MC and MM cartridges), into which the cartridge is designed to work with. If in doubt,
please consult your dealer or manufacturer.
Examples of typical settings
Ortofon Rondo Red (Low-Output MC): Gain 60dB, Impedance 10 Ohms,
Capacitance is irrelevant for low-output MC cartridges, and set to the lowest value of 50 pF when the Phono
Box RS2 is operating in MC mode.
Ortofon 2M Red (MM): Gain 40dB, Capacitance 150pF, Impedance 47k Ohms (47k Ohms are automatically
selected when the Phono Box RS2 is operating in MM mode)
Ortofon X5-MC (High-Output MC): Gain 40dB, Capacitance 350pF, Impedance 47k Ohms (47k Ohms are
automatically selected when the Phono Box RS2 is operating in MM/High-Output MC mode)
Technical specifications Pro-Ject Phono Box RS2
Input MM capacitance/impedance:
50pF, 100pF, 150pF, 200pF, 250pF, 300pF, 350pF or 400pF /
47kOhms
Input MC impedance/capacitance:
Stepless 10ohms
–
1000 Ohms / 50pF
MM Gain (+ 6dB using XLR sockets):
40, 43, 46, 50 dB
MC Gain (+ 6dB using XLR sockets):
60, 63, 66, 70 dB
Signal / Noise ratio MM (40dB):
82dB (RCA, XLR), 89dB A-wt (RCA, XLR) (10mV)
Signal / Noise ratio MC (60dB)
66dB (RCA,XLR), 76dB A-wt (RCA,XLR) (1mV)
MM THD+N:
<0,005% (MM 40dB, 1kHz)
MC THD+N:
<0,04% (MM 60dB, 1kHz)
MM THD:
<0,0015% (MM 40dB, 1kHz)
MC THD
<0,0024% (MM 60dB, 1kHz)
RIAA-equalization curve accuracy
< +-0,4dB / 20Hz - 20kHz
Subsonic filter:
at 20Hz with 18dB/octave
Input:
1 pair RCA/phono sockets, 1 pair XLR sockets
Line-level output:
1 pair RCA/phono sockets, 1 pair XLR sockets
Wiring XLR sockets:
1 ground, 2 “hot” and 3 “cold”
Outboard power supply:
20V/3A DC
Power consumption:
310mA DC, max. 350mA
Dimension W x H x D (D with sockets):
206 x 72 x 200 (230) mm
Weight:
1600 g without power supply
