Phono Box RS is an ultra-low noise, ultra-low distortion phono preamplifier designed to deliver breathtaking performance from your phono cartridge through the availability of an unprecedented range of adjustments. Proper impedance matching is essential in optimizing performance of cartridge and Phono Box RS offers one of the industry’s most unique solutions to this. Continuously adjustable (even ‘on-the-fly’) loading is at your fingertips via the front-facing potentiometer so that you can ‘tune’ while you listen.

Dual-Mono Design

Top-grade componentry is used throughout the dual-mono circuit topology ensuring exceptional quietude and purity of sound. Unique features include a fully passive, selectable RIAA and DECCA phono equalization circuit, MM/MC capability with adjustable capacitance and fully balanced ins & outs. Heavily shielded chassis metalwork is used to shield the circuitry from the negative effects of vibration and electrical interference.

Additional information
Weight 2 kg
Dimensions 21 × 20.6 × 7.2 cm



  • MM & MC capable
  • True dual mono design
  • Balanced XLR & unbalanced RCA in & outputs
  • Fully passive RIAA & DECCA equalisation
  • Unique continuously variable input impedance loading, adjustable while listening
  • RCA & XLR in & out
  • Superior low noise / low distortion
  • Classy & elegant dip switches
  • DC power supply (< 1 watt standby power)
  • Metal casing protects against vibration and interference
  • Available in silver or black
  • Handmade in Europe


  • Input impedance, variable: stepless 10ohms – 1.200ohms A
  • Input capacitance/impedance: 100pF, 200pF, 300pF, 420pF and 520pF */47kohms B
  • Input impedance, fixed: 10ohms A
  • Input gain (+ 6dB using XLR sockets): 40dB and 50dB B / 60dB A
  • Noise floor: 91dB (A weighted)
  • THD: 0,019%
  • De-emphasis curve accuracy: 20Hz – 20kHz / max. 0,3dB
  • Subsonic filter: at 20Hz with 12dB/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: ±18V/250mA DC, suitable for your country’s mains supply
  • Power consumption: 150mA DC, <1W in standby

A: typical for low output MC cartridges, B: typical for MM cartridges or high output MC
*Input capacitance is irrelevant for low output MC cartridges.