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The Phono Box RS2 sets out to be the ultimate phono preamplifier, in the highest class. It is a fully discrete, fully balanced dual-mono device with split passive RIAA and DECCA equalisation, resulting in a “no expense spared” phono stage designed to achieve the best possible sound. It is also extensively adjustable, suiting it to any system, environment or personal listening taste.
After countless hours of listening tests and many years of experience, the Pro-Ject design team took the decision to employ discrete circuitry in the Phono Box RS2. Discrete circuits involve no operational amplifiers (op-amps), and the result is a more neutral, natural, dynamic, and vivid sound. They are more complicated to put together and involve a greater variety of components, but the result when utilised in a well-organised electrical layout is a true high-end sound.
Specifications
MM capacitance/impedance: 50pF-400pF / 47kOhms
MC impedance/capacitance: Stepless 10–1k Ohms /50pF
Gain
MM Gain (+ 6dB using XLR): 40, 43, 46, 50 dB
MC Gain (+ 6dB using XLR): 60, 63, 66, 70 dB
SNR
MM (40dB): 82dB, 89dB A-wt (RCA, XLR) (10mV)
MC (60dB): 66dB, 76dB A-wt (RCA, XLR) (1mV)
THD+N
MM: <0.005% (MM 40dB, 1kHz)
MC: <0.04% (MM 60dB, 1kHz)
MM THD: <0.0015% (MM 40dB, 1kHz)
MC THD: <0.0024% (MM 60dB, 1kHz)
Performance
RIAA-EQ Curve Accuracy: < +-0.4dB / 20Hz-kHz
Subsonic filter: at 20Hz with 18dB/octave
Connections
Input: 1 pair RCA/Phono, 1 pair XLR
Line-level output: 1 pair RCA/Phono, 1 pair XLR
Wiring XLR: 1 ground, 2 “hot” and 3 “cold”
Power
Outboard power supply: 20V/3A
DC Power consumption: 310mA DC, max. 350mA
General
Dimensions (WHD): 206 x 72 x 200mm
Weight: 1600g w/o power supply