Hertz SP 4.900 Hertz SPL Show SP 4.900 D-Class 4 Channel Amplifier 250 WRMS x 4 at 2Ω (IP55 rated)

Features -
Up to 85% 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 x 4 (4Ω) with ultra-compact size (211,6 x 130 mm)
IP55 aluminum chassis for maximum protection against humidity and external agents
No cooling fan to prevent internal accumulation of dirt
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

General Specifications -
Channels: 4 - 3 - 2
Nominal power supply voltage: 11 √∑ 15 VDC
Pulse Operating voltage: 6 √∑ 16 VDC
Idling current: 1.1 A
Idling current when off: 0.03 mA
Consumption @ 14.4 VDC, MIN load impedance (Max Musical Power): 50 A
Remote IN: 6 √∑ 15 VDC (9 mA)
DC-REM - Remote Turn on by SPK DC from OUTPUT BTL speakers: 3.5 √∑ 7 VDC
Distortion - THD @ 1 kHz, 4Ω, 70% Rated Power: 0.02%
Damping factor @ 1 kHz, 4Ω, 2 VRMS: 200
Bandwidth @ -3 dB: 10 Hz √∑35 kHz
S/N ratio (A weighted @ 1 V Input): 105 dBA
Pre-In sensitivity: 0.6 √∑ 6 VRMS
Speaker-In sensitivity: 2.2 √∑ 22 VRMS

Output Power -
Output Nominal Power (RMS) @ 14.4 VDC, THD 1%:
4 Ch: 160 W x 4 (4Ω)
4 Ch: 250 W x 4 (2Ω)
3 Ch: 160 W x 2 (4Ω) + 500 W x 1 (4Ω)
3 Ch: 250 W x 2 (2Ω) + 500 W x 1 (4Ω)
2 Ch: 500 W x 2 (4Ω)