Class D Power Plant One-Ohm Stable SHOCwave™ Bass Restoration Processor KXARC Wireless Remote Included Gain Control With "Optimal Input" Variable 24dB Subsonic Filter FIT2™ (Fail-Safe Integration Technology) Circuitry Variable 24dB Crossover DSP-Controlled Preamp KickEQ+™ 18dB Variable Bass Boost Easy Access to Settings Behind Hinged Panel Black Anodized Aluminum Chassis Top-Mounted Red LED Light Pipe