Special features:

Pure Class GD amplifier technology
Audiotec Fischers proprietary Pure Class GD concept takes the efficiency of conventional Class D amps to the next level. By varying the internal supply voltage depending on the amplifier’s input signals, idle losses are significantly reduced and overall efficiency is close to maximum at any time. So heat dissipation is almost negligible thus allowing smallest heat sinks and most compact form factors. Besides that Pure Class GD amp outperforms conventional Class D designs in terms of sound quality by implementing a fully differential signal path and improved output filter design.

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 V EIGHT DSP.
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.

Power Save Mode
The Power Save Mode is incorporated in the basic setup. It allows to significantly reduce the power consumption of the V EIGHT DSP and connected amplifiers once there’s no input signal present for more than 60 seconds. Please note that in many up-to-date cars with “CAN” or any other internal bus structures it may happen that the radio remains “invisibly” turned on for up to 45 min. even after leaving the car! Once the “Power Save Mode“ is active the remote output (Rem Out) and the internal amplifier stages will be turned off. The HELIX V EIGHT DSP will reactivate the remote output and the internal amplifier stages within a second if a music signal is applied. It is possible to either modify the turn-off time of 60 sec. or completely deactivate the “Power Save Mode” via the DSP PC-Tool software.

Start-Stop capability
The switched power supply of the HELIX V EIGHT DSP assures a constant internal supply voltage even if the battery’s voltage drops to 6 Volts during engine crank.

Automatic Digital Signal Detection
Switching from analog input to the digital input is done automatically as soon as a signal is detected on the Optical Input. This feature can be deactivated in the DSP PC-Tool software. Alternatively you can use an optional remote control for manual switching between analog and digital inputs.


RMS power
– @ 4 Ohms 75 Watts per channel (≤ 1% THD+N)
– @ 2 Ohms 120 Watts per channel (≤ 1% THD+N)
Inputs  6 x RCA / Cinch
6 x Highlevel speaker input
1 x Optical SPDIF (12 – 96 kHz)
1 x Remote In
Input sensitivity RCA / Cinch 2 – 4 Volts or 4 – 8 Volts
Highlevel 5 – 10 Volts or 10 – 20 Volts
Outputs 8 x Speaker
2 x RCA / Cinch
2 x Remote Out
Output voltage RCA 3 Volts RMS
Frequency response 20 Hz – 22,000 Hz
DSP resolution 64 Bit
DSP power 295 MHz (1.2 billion MAC operations per second)
Sampling rate 48 kHz
Signal converters A/D: BurrBrown
D/A: BurrBrown
Signal-to-noise ratio (A-weighted) 105 dB (digital input)
100 dB (analog input)
Distortion (THD) < 0.015 %
Damping factor > 70
Input impedance RCA / Cinch 10 kOhms
Input impedance highlevel 13 Ohms or 13 kOhms
Operating voltage 10.5 – 16 Volts (max. 5 sec. down to 6 Volts)
Additional features Control Input, USB, HEC slot
Dimensions (H x W x D) 44 x 220 x 180 mm / 1.73 x 8.66 x 7.09”