SSL EV3000D EVOLUTION 3000W Class D Monoblock Amplifier with Remote Subwoofer Level Control (Discontinued by Manufacturer) One Ohm Stable Mono-Block Strapping capability: Strap two amps together for twice the power (2 Ohm stable) Variable low pass filter: 50 -150Hz Variable subsonic filter: 15 - 40Hz Variable 0 to +18dB Bass Boost