The Pro-Ject Audio Systems Phono Box RS is a phono preamplifier with ultra-low noise and distortion, designed to deliver stunning performance from the phono cartridge through a unique range of adjustments. Proper resistance matching is essential for optimizing the cartridge's performance, and the Phono Box RS offers one of the most unique industry solutions for this. Continuously adjustable (even ‘on-the-fly’) loading is available through the front-end potentiometer, allowing you to ‘tweak’ while you listen.

Dual-Mono Design
High-quality materials are used throughout the dual-mono circuit topology to ensure exceptional quietness and sound clarity. Unique features include a fully passive, selectable RIAA and DECCA phono equalization circuits, MM/MC capability with adjustable capacitance, and fully balanced inputs & outputs. A heavily shielded metal chassis is used to protect the circuitry from the negative effects of vibrations and electrical interference.

Features

• MM & MC capabilities
• True dual mono design
• Balanced XLR & unbalanced RCA inputs & outputs
• Fully passive RIAA & DECCA equalization
• Unique continuously variable input loading with adjustments while listening
• RCA & XLR inputs
• Superior low noise / low distortion
• Sleek & refined dip switches
• DC power supply (< 1 watt in standby)
• Metal case protects against vibrations and interference
• Made in Europe

Technical Specifications

• Input resistance, variable: 10ohms – 1,200ohms
• Input capacitance/resistance: 100pF, 200pF, 300pF, 420pF, and 520pF
• Fixed input resistance: 10ohms
• Input gain (+ 6dB using XLR jacks): 40dB and 50dB / 60dB
• Noise level: 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 of RCA/phono jacks, 1 pair of XLR jacks
• Line level output: 1 pair of RCA/phono jacks, 1 pair of XLR jacks
• XLR jack connection: 1 ground, 2 “hot” and 3 “cold”
• External power supply: ±18V/250mA DC, suitable for your region's power supply
• Power consumption: 150mA DC, <1W in standby