Features:  

• Up to 87% efficiency thanks to ADC (Advanced D-Class) output stage.
• USS (Universal Speakers Simulators) allows SP 4.900 to work with head units featuring the “speaker load detection” circuit.
• 160 W RMS x 4 (4Ω) with ultra-compact size 211.6 x 130 x 49 / 8.3 x 5.1 x 1.9 (mm/inch).
• IP55 aluminium chassis for maximum protection against humidity and external agents.
• No cooling fan to prevent internal accumulation of dirt 6. Sealed power cord, line inputs, and speaker outputs to prevent oxidation.
• Crossovers filters and controls on a single side to facilitate calibration when the product is installed.

Specifications: 

• 4-channel amplifier

• 160 watts RMS x 4 at 4 ohms
• 250 watts RMS x 4 at 2 ohms
• 500 watts RMS x 2 bridged at 4 ohms,
• CEA-2006 compliant: 145 watts RMS x 4 at 4 ohms , 1% THD+N, 14.4 volts
• Hertz Advanced D-Class amp technology — frequency response: 10-35,000 Hz
• Variable high- and low-pass filters (50-5,000 Hz, 12 dB/octave)
• Variable bass boost on Ch 3-4 (0-8 dB at 45 Hz)

• IP55 rated for dust- and water-protection

• Conformal-coated circuit boards, aluminum chassis, protective control cover
• Power, input, and output wire harnesses sealed for protection

• Preamp and speaker-level inputs

• USS circuit supplies load for receiver output to prevent shut-down
• RCA-to-wire adapters included

• Wiring, fuse, and hardware not included with amplifier

• Dimensions (W x H x D): 8.853" x 1.936" x 5.15"