Tailored for individuals seeking top-notch performance and exceptional sound fidelity in car amplifiers... The HL800.4 stands out with its 900W RMS power output at 2 Ohms, spread across 4 channels delivering 225W RMS each, and offering extensive installation flexibility. It comes equipped with separate adjustments for the Front and Rear channels, including a LEVEL control for fine-tuning the input signal and a Crossover feature that allows users to choose between LOW-PASS, HIGH-PASS, or FLAT (FULL-RANGE) settings. INSTALLATION SUGGESTIONS: Accommodates 16 tweeters/drivers (horns), with 4 per channel wired in parallel. Supports Bridge mode for 2 channels, delivering 400W at 4 Ohms (Front, Rear). Offers versatility with 3-channel configurations: two channels operating independently at 200W each and one channel in Bridge mode at 400W. Supports Tri-mode operation, allowing for a 4 Ohm speaker in bridge mode alongside 2 horns or 2 super tweeters per channel. Number of Channels: 4 RMS Power at 2 Ohms 12.6V: 4 x 225W RMS (STEREO) RMS Power at 4 Ohms 12.6V: 4 x 140W RMS (STEREO) RMS Power at 2 Ohms 13.8V: 4 x 260W RMS (STEREO) RMS Power at 4 Ohms 13.8V: 4 x 165W RMS (STEREO) Power @ 12.6V Bridge 4 Ohms: 2 x 450W RMS Power @ 13.8V Bridge 4 Ohms: 2 x 520W RMS Supply Voltage: 9V ~ 15V DC Frequency Response: 10Hz ~ 26KHz Crossover Low Pass: 90Hz Crossover High Pass: 90Hz Signal-to-Noise Ratio: 90 dB Total Harmonic Distortion: 0.4% THD Input Sensitivity: 200mV Input Impedance: 14K OHMS Minimum Output Impedance: STEREO 2 OHMS / STEREO 4 OHMS Consumption with Musical Signal: 44A Consumption with Bass Signal: 88A Dimensions (H x W x L) mm: 66 x 206 x 206 mm Weight Kg: 1.7 Kg