OEM Systems Pro-Wire Tabletop Volume Control (TT-IMP100WV) Frequency Response: 20-20 kHz +/- 0.5dB Color: Black Power Handling: 100 Watts Max per channel Impedance: Optimized for 8 ohm speakers Mounting Dimensions: 8-1/2" W x 2-5/8" H x 9-1/2" deep