The new entry into the HELIX world! The amplifiers of the D series are solely modest with respect to pricing. Everything else is thoroughly pure HELIX quality without any compromises. Loads of power, excellent measurement data and a whole bunch of features ensure a pristine and crispy sound experience!
Absolutely nothing has been missed for powerful sound reproduction - the active crossover with highpass filter, lowpass filter, bandpass and bass boost are equally as self-evident as the intelligent highlevel input that incorporates Audiotec Fischer´s proprietary ADEP circuit. It is even possible to add an optional volume remote control for the amp channels C and D which is very useful if those outputs are firing a subwoofer.
The elegant design not only states right from the beginning the amp's heritage but also allows an easy integration into your car thanks to its compact dimensions. That is sound-tuning at its best!
- 4-channel high- and lowlevel input
- Smart highlevel input with ADEP circuit (Advanced Diagnostics Error Protection) and Auto Turn-On function
- Fully active crossover with highpass, lowpass, bandpass and bass boost
- Extremely stable MOSFET power supply
- “Input mode” switch for flexible input signal routing
- Highlevel input sensitivity up to 14 Volts max.
- Cable remote control for volume adjustment of the channels C & D optionally available
- Massive aluminum heatsink for best cooling conditions
Smart highlevel input
The latest generation of OE car radios incorporates sophisticated possibilities of diagnosing the connected speakers. If a common amplifier will be hooked up failure messages and loss of specific features (e.g. fader function) quite often appears - but not with the D FOUR.
The new ADEP circuit (Advanced Diagnostics Error Protection) avoids all these problems without loading the speaker outputs of the OE radio during high volumes unnecessarily.
|Output power RMS / max.|
|- @ 4 Ohms||4 x 65 / 130 Watts|
|- @ 2 Ohms||4 x 90 / 180 Watts|
|- @ 1 Ohm||-|
|- bridged @ 4 Ohms||2 x 180 / 360 Watts|
|- bridged @ 2 Ohms||-|
|Amplifier technology||Class AB|
|Inputs||4 x RCA / Cinch
4 x Highlevel speaker input
1 x Remote In
1 x Remote control input
|Input sensitivity||RCA / Cinch 0.5 - 6 Volts
Highlevel 1 - 14 Volts
|Input impedance RCA / Cinch||30 kOhms|
|Input impedance highlevel||12 Ohms|
|Outputs||4 x Speaker output|
|Output voltage RCA / Cinch||-|
|Signal converter for digital input||-|
|Frequency response||10 Hz - 50.000 Hz|
|Bass boost||0 - 12 dB / 45 Hz|
|Highpass||15 Hz - 4,000 Hz adjustable|
|Lowpass||40 Hz - 4,000 Hz adjustable|
|Bandpass||15 Hz - 4,000 Hz adjustable|
|Slope high- / lowpass||12 dB/Oct.|
|Slope subsonic / lowpass||-|
|Signal-to-noise ratio digital input||-|
|Signal-to-noise ratio analog input||108 dB (A-weighted)|
|Distortion (THD)||0.02 %|
|Operating voltage||9.6 - 16 Volts|
|Idle current||1000 mA|
|Fuse||2 x 25 A Maxi-fuse (APX)|
|Additional features||Active, adjustable crossover, bass boost, input mode switch, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP), optional cable remote control|
|Dimensions (H x W x D)||53 x 320 x 230 mm /
2.09 x 12.60 x 9.06”