Martin Logan Dynamo 300

Dynamo 300 High-Resolution Subwoofer System. This powered subwoofer features a built-in amplifier rated at 75 watts RMS (150 watts peak). It presents an input impedance of 10,000 ohms for both its line-level RCA and speaker-level inputs, and it is compatible with 4, 6, or 8-ohm rated amplifiers.