Pro-Ject Phono Box S Incredible Versatility and Protection from Subsonic Interference The Phono Box S, Pro-Ject"s latest phono preamplifier, offers unrivaled performance and unique flexibility never before available at this price point. Phono Box S"s extremely impressive sound quality is a massive improvement and a perfect upgrade for most analog hi-fi systems. With a wide range of setting parameters (accessible via a panel on the bottom of the unit), Phono Box S can meet the needs of almost any phono cartridge on the market. A switchable subsonic filter prevents ultra low rumble below 20Hz. Carefully selected amplifier modules and audiophile-grade polypropylene capacitors increase dynamic response, warmth, and transparency. With Phono Box S"s improved bass texture and incredibly detailed resolution, you will enjoy your valuable vinyl collection like never before. Features: Audiophile Performance Dual mono configuration Audiophile-grade amplification modules Audiophile-grade polypropylene WIMA capacitors Precise RIAA equalization Switchable Subsonic filter -12dB @ 20Hz Switchable input impedance/capacitance 4 adjustable gain levels Outstanding sound quality