Hertz SP 4,900 - 4-channel D-CLASS 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 easy calibration when the power amp is installed

Key Features

• Channels: 4 - 3 - 2
• Nominal supply voltage: 11 ÷ 15 VDC
• Pulse operating voltage: 6 ÷ 16 VDC
• No-load current: 1.1A
• Quiescent current when switched off: 0.03mA
• Consumption at 14.4 VDC, MIN. Load Impedance (Max Music Output): 50A
• Remote INPUT: 6 ÷ 15 VDC (9 mA)
• DC-REM - Remote power on by SPK DC from OUTPUT BTL loudspeakers: 3.5 ÷ 7 VDC
• Distortion - THD @ 1kHz, 4Ω, 70% rated power: 0.02%
• Damping factor at 1 kHz: 4 Ω, 2 VRMS: 200
• Bandwidth at -3 dB: 10 Hz ÷ 35 kHz
• S/N ratio (A-weighted at 1V input): 105 dBA
• Pre-in sensitivity: 0.6 ÷ 6 VRMS
• Speaker input sensitivity: 2.2 ÷ 22 VRMS
• IP protection class: IP55
• Operating temperature range: 0°C (32°F) to 55°C (131°F)
• Adjustable crossovers: yes

Minimum load impedance:

• @ 4Ch 2Ω
• @ 3Ch2Ω + 2Ω + 4Ω
• @ 2Ch4Ω

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