The first stand-alone DSP that deserves to be called a HELIX. The new HELIX DSP is more than convincing proof that noisy, distorting sound processors are finally a thing of the past. Excellent technical specs are combined with a feature package that could hardly be more impressive in actual practice. Intuitive operation thanks to a clearly structured graphical PC interface enables any ambitious sound freak to optimize the sound virtually any which way.


  • Powerful “fixed point” Audio DSP with 56 Bit resolution
  • Freely configurable inputs and outputs
  • Paragraphic 30-band EQ per channel with ultra-precise 0.25 dB steps, fine adjustment of the individual bands in 1/24 octave steps and a quality setting between 0.5 and 15
  • Time-alignment adjustment in narrow 7 mm steps
  • Various filter characteristics with 6 – 30 dB slope available
  • Inputs: 6 x RCA, 4 x highlevel, 1 x optical
  • Outputs: 8 x RCA and remote output
  • Extremely compact dimensions: 40 x 177 x 120 mm; 1.6 x 7 x 4.75″

Special features:

Power Save Mode Specification
The Power Save Mode is incorporated in the basic setup. It allows to significantly reduce the power consumption of the amplifiers that are connected to the HELIX DSP 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” and therefore the connected amplifiers will be turned off. The HELIX DSP will reactivate the “Remote Output” 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 made” via theDSP PC-Tool software.

Start-/Stop capability
The switched power supply of the HELIX 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 an signal is detected on the optical input. This feature can be deactivated in the DSP PC-Tool software. Alternatively you can use the optional cable remote control URC 2A for manual switching between analog and digital inputs.


Inputs 6 x RCA
4 x Highlevel speaker input
1 x Optical SPDIF-Format (6-96 kHz Sampling Rate)
1 x Remote In
Input sensitivity RCA/Cinch 4 Volts (internally adjustable) – default 4 Volts
Highlevel 5 – 11 Volts (intern. adjustable) – default 11 Volts
(corresponds to 6 – 30 Watts RMS – not max. power)
Outputs 8 x RCA
1 x Remote Out
Output voltage Max. 4 Volts RMS
Frequency response 10 Hz – 22,000 Hz
DSP resolution 56 Bit
DSP processing power 172 MHz
DSP type Audio signal processor
Signal converter A/D: BurrBrown
D/A: BurrBrown
Signal-to-noise ratio – digital input

Signal-to-noise ratio – analog input

112 dB (A-weighted)

107 dB (A-weighted)

Total harmonic distortion (THD+N) – digital input

Total harmonic distortion (THD+N) – analog input

< 0.001 %

< 0.003 %

IM distortion (IMD) – digital input

IM distortion (IMD) – analog input

< 0.003 %

< 0.007 %

Crosstalk > 90 dB @ 10 kHz
Operating Voltage 9.2 – 18 Volts, short drops down to 6 Volts acceptable
Current draw < 450 mA
Dimensions (H x W x D) 40 x 177 x 120 mm / 1.6 x 7 x 4.75“