The RCM Audio Sensor 2 Mk II is a high-performance MM/MC phono preamplifier designed to provide extensive cartridge matching, low noise and high output capability from a compact two-chassis design. Its separate power supply houses the transformer, rectification and first stage of voltage stabilisation, with a second stabilisation stage located within the main preamplifier chassis to isolate the sensitive audio circuitry from power-supply interference.
RIAA equalisation is performed by a two-stage passive network using low-noise resistors and polypropylene capacitors, with individual components measured and selected to achieve accurate channel matching. Seven sensitivity settings provide gain from 52–76dB, while eight impedance settings from 20Ω to 47kΩ allow precise matching with a wide range of moving-coil and moving-magnet cartridges. Selectable balanced or unbalanced input operation and both XLR and RCA outputs provide additional system flexibility.
Key Features
High-performance MM/MC phono preamplifier
Separate external power supply
Symmetrical power-supply architecture
Transformer, rectification and first stabilisation stage housed in separate PSU
Second power-supply stabilisation stage located within preamplifier chassis
Two-stage passive RIAA equalisation
Low-noise resistors and polypropylene capacitors in RIAA network
Individually measured and selected RIAA components
RIAA accuracy: ±0.3dB from 20Hz–20kHz
Selectable balanced or unbalanced input operation
RCA phono input
Balanced XLR output
Single-ended RCA output
Input sensitivity adjustable from 0.3–5mV
7 sensitivity settings: 0.3 / 0.4 / 0.6 / 0.9 / 1.4 / 2.5 / 5mV
Gain range: 52–76dB for 2Vrms output at 1kHz
Input impedance adjustable from 20Ω–47kΩ
8 impedance settings: 20 / 30 / 50 / 100 / 200 / 400 / 1,000 / 47k Ω
Input capacitance: 150pF
Nominal output level: 2Vrms
Maximum output level: 8Vrms
Output impedance: 70Ω
THD: 0.01% at 1kHz
Signal-to-noise ratio: 85dB at lowest gain setting
Non-magnetic chassis construction
Optional Furutech gold or rhodium RCA, XLR and IEC connections
Preamplifier dimensions: 245 × 227 × 110mm
Power supply dimensions: 122 × 230 × 70mm
Preamplifier weight: 3.5kg
Power supply weight: 1.7kg
Maximum power consumption: 17W
The RCM Audio Sensor 2 Mk II is a high-performance MM/MC phono preamplifier designed to provide extensive cartridge matching, low noise and high output capability from a compact two-chassis design. Its separate power supply houses the transformer, rectification and first stage of voltage stabilisation, with a second stabilisation stage located within the main preamplifier chassis to isolate the sensitive audio circuitry from power-supply interference.
RIAA equalisation is performed by a two-stage passive network using low-noise resistors and polypropylene capacitors, with individual components measured and selected to achieve accurate channel matching. Seven sensitivity settings provide gain from 52–76dB, while eight impedance settings from 20Ω to 47kΩ allow precise matching with a wide range of moving-coil and moving-magnet cartridges. Selectable balanced or unbalanced input operation and both XLR and RCA outputs provide additional system flexibility.
Key Features
High-performance MM/MC phono preamplifier
Separate external power supply
Symmetrical power-supply architecture
Transformer, rectification and first stabilisation stage housed in separate PSU
Second power-supply stabilisation stage located within preamplifier chassis
Two-stage passive RIAA equalisation
Low-noise resistors and polypropylene capacitors in RIAA network
Individually measured and selected RIAA components
RIAA accuracy: ±0.3dB from 20Hz–20kHz
Selectable balanced or unbalanced input operation
RCA phono input
Balanced XLR output
Single-ended RCA output
Input sensitivity adjustable from 0.3–5mV
7 sensitivity settings: 0.3 / 0.4 / 0.6 / 0.9 / 1.4 / 2.5 / 5mV
Gain range: 52–76dB for 2Vrms output at 1kHz
Input impedance adjustable from 20Ω–47kΩ
8 impedance settings: 20 / 30 / 50 / 100 / 200 / 400 / 1,000 / 47k Ω
Input capacitance: 150pF
Nominal output level: 2Vrms
Maximum output level: 8Vrms
Output impedance: 70Ω
THD: 0.01% at 1kHz
Signal-to-noise ratio: 85dB at lowest gain setting
Non-magnetic chassis construction
Optional Furutech gold or rhodium RCA, XLR and IEC connections
Preamplifier dimensions: 245 × 227 × 110mm
Power supply dimensions: 122 × 230 × 70mm
Preamplifier weight: 3.5kg
Power supply weight: 1.7kg
Maximum power consumption: 17W
