1,750 x 1 @ 1 ohm RMS 1,750 x 1 @ 2 ohms RMS 1,250 x 1 @ 4 ohms RMS Variable 12dB low pass filter: 40Hz-20kHz Variable 12dB high pass filter: 10Hz-1kHz Variable 12dB Bass Boost @ 50Hz Power, protection & clipping indicators included Thermal, voltage, speaker short, and dc-offset protection circuitry Advanced 3-speed fan design Subsonic filter Intelligent full bridge design Wired remote control with clipping indicator included Delivering the same power at 1 or 2 ohms, Sundown SIA Smart amplifiers are built with power and stability at their core. These full-bridge amplifiers feature a heavy heatsink for outstanding thermal management, while the three-speed Smart Cooling fan and advanced power supply design protects the amplifier from overheating and distorted output.