ROSS Compressor for high-quality sound. It features a very smooth, and thick, pleasant sound. It excels at compression sounds for cutting and leads, but even with subtle settings, it transforms the tone into a noticeably thicker and more resilient sound. - Model: ROSS Compressor - Input Impedance: 215 kohms - Output Impedance: 100 ohms - Maximum Input Level: 400 mVrms - Output Level (Limiting): 0 - 250 mVrms - Compression Ratio: 15 - 40 dB - Attack Time: 1 msec - Release Time: 1.2 sec - Power Requirements: 9V DC, 37 mA Only used once after being purchased new.