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Hertz DP 4,400 4-Channel Amplifier
SKU:  DP-4.400
EAN:  8018823141451

3 Reviews

105 Watt

DP 4,400

SKU:  DP-4.400
EAN:  8018823141451

3 Reviews

Technical Highlights

  • 4-channel amplifier, high-resolution audio, 10 Hz to 50 kHz.
  • Compact, bridgeable, 2 Ω stability, universal compatibility.
  • Automatic functions, versatile setting options.
  • More technical details
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€194,65
-15% €229,00 €194,65
5% discount with credit card
inkl. VAT , possibly plus shipping
Only a few left in stock (2 pieces available)
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Jun 5, - Jun 6,
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DP 4,400 by Hertz

The DP 4.400 is a 4-Channel Amplifier from Hertz with High-Resolution Audio certification. The Class AB amplification is fully bridgeable and stable at 2 Ω, channels 4 - 3 - 2. The bandwidth at -3 dB ranges from 10 Hz to 45 kHz, the signal-to-noise ratio is 101 dBA, the damping factor is 130 at 1 kHz and 1 W, the distortion is 0.01% at 100 Hz and 70% rated power, and the efficiency is 60%. The power supply operates with 6.5 - 16.5 VDC, the nominal supply is 11 - 15 VDC via 2 x 25 A fuses, the idle current is 0.85 A, and the standby power consumption is 10 uA. There are preamplifier and speaker inputs available, a full-range preamplifier output for front, pre-in sensitivity of 0.32 - 8 VRMS, and speaker-in sensitivity of 1.6 - 40 VRMS. Adjustable crossovers with high-pass and low-pass Full/50 - 4000 Hz at 12 dB/octave for front and rear, as well as bass boost at 50 Hz from 0 - 9 dB, are integrated. ART Automatic remote control for turning SPK-IN on/off (only BTL radio) and minimum load impedances of 4 channels 2 Ω, 3 channels 2 Ω + 2 Ω + 4 Ω, and 2 channels 4 Ω are available.

Features
  • 4-Channel Amplifier
  • Amplifier Class AB
  • Fully bridgeable
  • Channels 4 - 3 - 2
  • Stable at 2 Ω
  • High-Resolution Audio certification
  • Inputs for preamplifier and speaker
  • Full-range preamplifier output for front
  • Adjustable crossovers
  • Front high-pass Full or 50 - 4000 Hz, 12 dB/oct.
  • Front low-pass Full or 50 - 4000 Hz, 12 dB/oct.
  • Rear high-pass Full or 50 - 4000 Hz, 12 dB/oct.
  • Rear low-pass Full or 50 - 4000 Hz, 12 dB/oct.
  • Bass Boost 50 Hz 0 - 9 dB
  • Pre-In sensitivity 0.32 - 8 VRMS
  • Speaker-In sensitivity 1.6 - 40 VRMS
  • ART Automatic remote control for turning SPK-IN on/off only BTL radio
  • Minimum load impedance 4 channels 2 Ω
  • Minimum load impedance 3 channels 2 Ω + 2 Ω + 4 Ω
  • Minimum load impedance 2 channels 4 Ω
Technical Specifications
  • Operating voltage 6.5 - 16.5 VDC
  • Nominal supply voltage 11 - 15 VDC
  • Fuses 2 x 25 A
  • Idle current 0.85 A
  • Standby power consumption 10 uA
  • Consumption at minimum load impedance maximum music power 30 A
  • Remote control IN 4 - 15 VDC 1.5 mA
  • 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
  • Output power RMS at 1% THD 4 channels at 4 Ω 75 W x 4
  • Output power RMS at 1% THD 4 channels at 2 Ω 105 W x 4
  • Output power RMS at 1% THD 3 channels at 4 Ω 75 W x 2 + 210 W x 1
  • Output power RMS at 1% THD 3 channels at 2 Ω/4 Ω 105 W x 2 + 210 W x 1
  • Output power RMS at 1% THD 2 channels at 4 Ω 210 W x 2
  • Output power at 14.4 VDC 10% THD 4 channels at 4 Ω 90 W x 4
  • Output power at 14.4 VDC 10% THD 4 channels at 2 Ω 125 W x 4
  • Output power at 14.4 VDC 10% THD 3 channels at 4 Ω 90 W x 2 + 250 W x 1
  • Output power at 14.4 VDC 10% THD 3 channels at 2 Ω/4 Ω 125 W x 2 + 250 W x 1
  • Output power at 14.4 VDC 10% THD 2 channels at 4 Ω 250 W x 2
  • Total power 1000 W

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Frequently Asked Questions about DP 4,400

What are the key technical specifications of the Hertz DP 4.400 Amplifier?

The Hertz DP 4.400 is a 4-Channel Amplifier with an output power of 75 W x 4 at 4Ω and 105 W x 4 at 2Ω at 1% THD. It supports a frequency range of 10 Hz to 50 kHz and features Class-AB amplification. The amplifier is High-Resolution Audio certified and offers an efficiency of 60%. The signal-to-noise ratio is 101 dBA. Its power supply ranges from 6.5 to 16.5 VDC, and it has a damping factor of 130 at 1 kHz, 1 W output.

What is the output power of the DP 4.400 Amplifier at different ohm levels?

The DP 4.400 provides 75 W x 4 channels at a 4-ohm impedance and 105 W x 4 channels at 2 ohms at 1% THD. At 4 ohms, the 3-channel output powers are 75 W x 2 plus 210 W x 1. When operating with 2 channels at 4 ohms, it delivers 210 W x 2. If the amplifier is operated at 14.4 VDC and 10% THD, the output powers increase to 90 W x 4 at 4 ohms and 125 W x 4 at 2 ohms, with 250 W x 2 in two-channel use at 4 ohms.

What special features does the DP 4.400 offer?

The Hertz DP 4.400 is characterized by its fully bridgeable Class-AB amplification, which is stable at two ohms. The amplifier features automatic on and off switching as well as universal compatibility with an operating supply voltage of 9 to 16.5 V and high input sensitivity. There are preamplifier and speaker inputs on the input side. The built-in bass boost function at 50 Hz allows for a gain of 0 to 9 dB. Additionally, integrated crossovers with adjustable settings from 50 to 4000 Hz are available, offering both high-pass and low-pass filter options.

How efficient is the DP 4.400 Amplifier?

The Hertz DP 4.400 Amplifier achieves an efficiency of 60%. Efficiency in an amplifier means how well the device converts electrical power into acoustic power. For Class-AB amplifiers, an efficiency of 60% is relatively high, meaning that the amplifier generates less waste heat for a given power consumption and delivers more power to the speakers. This is particularly important when the amplifier is used in a car, as high efficiency reduces the load on the vehicle's electrical system while ensuring better sound quality.

What crossover options does the DP 4.400 offer?

The DP 4.400 offers versatile crossover options for adjusting the audio signal. It features high-pass and low-pass filters for front and rear channels, which can be set within an adjustable range of 50 to 4000 Hz at 12 dB/octave. This allows for precise tuning of sound reproduction to the respective speakers, which is especially important in multi-channel systems in vehicles. It enables optimized playback of both low and high-frequency signals, resulting in a clearer and more precise sound experience in the car.

What does the High-Resolution Audio certification of the DP 4.400 mean?

The High-Resolution Audio certification of the Hertz DP 4.400 ensures that the amplifier is capable of elevating audio signals beyond the standard CD quality range. With a frequency response of 10 Hz to 50 kHz, it can capture the nuances of audio data provided by lossless formats and high-resolution files. This makes the amplifier a solution for audio enthusiasts who want to enjoy the best possible sound experience in their vehicles by hearing an incomparably detailed and rich soundscape.

Is the Hertz DP 4.400 stable at 2 ohm load?

Yes, the Hertz DP 4.400 Amplifier is stable at a 2 ohm load. This means that the amplifier offers enhanced flexibility for various speaker setups. When using speakers with a lower impedance like 2 ohms, the amplifier can output more power, improving audio quality. For four-channel configurations, it delivers 105 W x 4 at 2 ohms. This stability ensures that even at low impedances, the sound fidelity and performance of the amplifier are maintained without overheating issues or distortion.

What is the signal-to-noise ratio of the DP 4.400?

The Hertz DP 4.400 Amplifier offers an impressive signal-to-noise ratio (SNR) of 101 dBA. A high SNR means that the audio signal output by the amplifier is much louder than the background noise level, resulting in clearer, more precise audio output. An SNR of 101 dBA is particularly noteworthy and indicates that the amplifier is designed to deliver high-quality, low-noise sound reproduction. This is crucial for discerning music lovers who appreciate fine details in their music and desire lossless sound quality.

Can the DP 4.400 Amplifier be turned on and off automatically?

Yes, the Hertz DP 4.400 features an automatic on and off function based on the entertainment electronics interface SPK-IN (suitable only for BTL radios). This functionality ensures that the amplifier is activated or deactivated without manual operation of the sensor. With a trigger level of 1.5 VDC, the amplifier automatically turns on when an audio signal is detected and turns off as soon as no signal is present. This eliminates the need for additional control lines and makes integration into existing systems remarkably simple.

What power supply does the Hertz DP 4.400 require?

The Hertz DP 4.400 Amplifier requires a power supply in the range of 6.5 VDC to 16.5 VDC for operation. The nominal voltage of the power supply is 11 to 15 VDC, protected by 2 x 25 A fuses. At idle current, it consumes 0.85 A, while the standby power consumption is only 10 µA, which is advantageous for use in vehicles to preserve the Battery. With a minimum load impedance of 2 Ω for all 4 channels, the amplifier is well-equipped for multichannel configurations and provides an outstanding audio experience.

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