Thank you for viewing. This is a Pro-Ject MM/MC cartridge compatible phono equalizer. I purchased it new in October 2024 and used it, but I am selling it because I purchased a record player with a built-in phono equalizer and no longer need it. The main unit has almost no noticeable scratches or stains and is like new, but the box has some slight dirt and damage. Please understand that this is a used item, and if you are looking for a perfect item, please refrain from purchasing. From the manufacturer's manual... The PHONOBOX/SL is a model that can be said to be the origin of the current BOX DESIGN series. It embodies the concept of a small chassis that doesn't take up much space even when placed next to the player, a simple design and operability, and a high-performance phono amplifier that can be said to be true HiFi playback, and it became a big hit. Please compare it with the phono stage of your integrated amplifier. You can easily upgrade your system. Specifications Input impedance (fixed) MM 47k Ω / 120 pF MC 100 Ω / 120 pF MM gain 40dB Output voltage 300mV/1kHz (MM input: 3mV/1kHz) MC gain 60dB Output 300mV/1kHz at MC input 0.3mV/1kHz Maximum output 9.5V (1KHz) S/N ratio 86dB MM (94dB A weighted) High-frequency distortion (THD) MM 0.01%, MC RIAA deviation maximum 0.5dB (20Hz 20kHz) Power supply 18V/200mA DC (AC adapter) Power consumption <1 watt (standby) Maximum external dimensions (including terminals) 103 (width) x 36 (height) x 109 (depth) mm Weight 540g (excluding AC adapter)