Hertz SP 4,900 - 4-Channel Amplifier

Hertz SP 4,900

• Up to 85% efficiency thanks to the ADC (Advanced D-Class) power amplifier 
• A USS (Universal Speakers Simulator) enables the SP 4.900 to work directly with OEM head units equipped with the "Speaker Load Detection" circuit 
• 160 x 4 watts RMS (4Ω) with an ultra-compact size (211.6 x 130 mm) 
• Aluminium housing IP55 for maximum protection against moisture and external influences 
• No cooling fan to prevent dirt accumulation inside 
• Power cables, line inputs and speaker outputs sealed to prevent oxidation 
• Crossover filters and controls on a single page for easier calibration when the power amp is installed

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 @ 1V input) - 105 dBA 
• Pre-In sensitivity - 0.6 ÷ 6 VRMS 
• Speaker-In sensitivity - 2.2 ÷ 22 VRMS 

Minimum load impedance:

• @ 4Ch 2Ω 
• @ 3Ch 2Ω + 2Ω + 4Ω 
• @ 2Ch 4Ω 

• IP Rating - IP55 
• Operating Temperature Range - 0°C (32°F) to 55°C (131°F) 
• Max size (mm/inch) - 211.6 x 130 x 49
• Weight (kg/lbs) - 2.15
• Adjustable Crossovers - yes

Output power

• Output Nominal Power (RMS) @ 14.4 VDC, THD 1%:
• 4 Ch: 160W x 4 (4Ω) 
• 4 Ch: 250W x 4 (2Ω) 
• 3 Ch: 160W x 2 (4Ω) + 500W x 1 (4Ω) 
• 3 Ch: 250W x 2 (2Ω) + 500W x 1 (4Ω) 
• 2 Ch: 500W x 2 (4Ω) 
• Total Power RMS 1000W