Hertz DP4,400

The DP 4.400 from Hertz is a powerful 4-channel amplifier that offers High-Resolution Audio certification. With a frequency response of 10 Hz to 50 kHz and a maximum output power, this compact device impresses despite its size. The amplifier has a fully bridgeable Class AB amplification and is stable at two Ω. It also offers universal compatibility with an operating supply voltage of 9 to 16.5 V and high input sensitivity. Convenient features such as "automatic switching on and off" and versatile setting options for bass boost and crossovers make it the ideal choice for demanding car audio enthusiasts.

• channels 4 - 3 - 2
  
• amplifier class AB
  
• Nominal voltage of power supply (fuse) 11 - 15 VDC (2 x 25 A)
  
• Operating voltage of the power supply 6.5 - 16.5 VDC
  
• no-load current 0.85 A
  
• Standby current consumption 10 uA
  
• Consumption, MIN load impedance (max. music power) 30 A
  
• Remote control IN 4 - 15 VDC (1.5 mA)
  
• ART - Automatic remote control on/off of SPK-IN (BTL radio only)
• 1.5 VDC
  
• efficiency 60%
  
• Distortion - THD at 100 Hz, 70% rated power 0.01%
  
• Damping factor at 1 kHz, 1 W 130
  
• Bandwidth at -3 dB 10 Hz - 45 kHz
  
• Signal-to-noise ratio (A-weighted at 1 V input) 101 dBA
  
• minimum load impedance 
  
• for 4 channels: 2 Ω
  
• with 3 channels: 2 Ω + 2 Ω + 4 Ω
  
• @ 2 Ch: 4 Ω
  
• Adjustable crossovers yes
  
• Inputs Preamplifier input/Speaker input
  
• Preamplifier output full range (front)
  
• Pre-In sensitivity 0.32 - 8 VRMS
  
• Speaker-In sensitivity 1.6 - 40 VRMS
  
• Front channel high pass full / 50-4000 Hz 12 dB/oct.
  
• Front channel low-pass full / 50-4000 Hz 12 dB/oct.
  
• Rear Ch Hi-Pass Full / 50-4000Hz 12dB/Oct.
  
• Rear Ch Lo-Pass Full / 50-4000Hz 12dB/Oct.
  
• Bass Boost 50Hz 0 - 9 dB 

• output power
• Output power (RMS) @ 1% THD:
  
• 4Ch @ 4Ω 75 W x 4
  
• 4Ch @ 2Ω 105 W x 4
  
• 3Ch @ 4Ω 75W x 2 + 210W x 1
  
• 3 channels at 2Ω/4Ω 105W x 2 + 210W x 1
  
• 2 channels at 4 Ω 210 W x 2
  
• Output power (rms) at 14.4 VDC, THD 10%: 
  
• 4 channels at 4 Ω 90 W x 4
  
• 4 channels at 2 Ω 125 W x 4
  
• 3 channels at 4 Ω 90 W x 2 + 250 W x 1
  
• 3 channels at 2Ω/4Ω 125W x 2 + 250W x 1
  
• 2 channels at 4 Ω 250 W x 2
  
• total power 1000 W