Helix V Twelve DSP 12 Ch DSP Amplifier


12 high level inputs, 6 Cinch inputs, 14 DSP channels, 12 output stages with up to 160 RMS at 2 Ohms combined in an ultra-compact housing


The king of connectivity
That has never existed before – 12 high level inputs, 6 Cinch inputs, 14 DSP channels, 12 output stages with up to 160 RMS at 2 Ohms combined in an ultra-compact housing that has the footprint of just two envelopes. The new V TWELVE DSP is unmistakeably a technological milestone and the problem solver par excellence when it comes to upgrading multichannel premium sound systems in today’s vehicles.

Connectivity redefined
What to do if a vehicle is already equipped with a premium sound system ex works, whose amplifier often already has more than 10 channels? In many cases, a replacement is no longer possible, so that only an amplifier with the same number of highlevel inputs can be considered for upgrading the system. The V TWELVE DSP is the first amplifier worldwide that offers 12 highlevel inputs and just as many amplifier channels, a digital input and a HEC slot. The integrated DSP can handle this easily, since it comes with the incredible number of fourteen (14!) separate channels.

Virtual Channel Processing – this is how signal routing works today
The adaptation to modern OE sound systems via an increasing number of inputs has a significant impact on the complexity of the signal routing inside the amplifier. Especially when several input signals are mixed together and then split again into multi-way systems, conventional routing concepts quickly reach their limits. Audiotec Fischer’s new multi-stage “Virtual Channel Processing”, in conjunction with the recognized user-friendly DSP PC-Tool software makes it easy to realize even highly complex system configurations. Besides, it allows to freely assign our proprietary FX sound features such as “RealCenter” or “Augmented Bass Processing”. But thanks to its enormous number of channels, the V TWELVE DSP is also a prime example for applications in which a 1 to 1 routing (IOR) makes sense.

Such a huge number of channels requires ultra-fast hardware – Audiotec Fischer’s proprietary 32 Bit ACO platform takes over all control tasks and ensures exceptional speed especially for data communication with our DSP PC-Tool software, but also for lightning-fast switching between up to ten possible sound setups. The fantastic sound effects associated with the ACO platform such as Augmented Bass Processing, StageXpander or RealCenter are just as natural with the V TWELVE DSP as a 12-channel input EQ including our Input Signal Analyzer (ISA) for easy analysis and compensation of the input signals from OE radios.

Sound quality without any compromises
Separate AD and DA converters of the latest generation from Asahi Kasei with a native resolution of 32 Bit ensure optimal sound performance, best possible signal-to-noise ratio and minimal distortion. Concerns that the abundance of audio channels and the extremely dense design could have an impact on the sound quality are completely out of place for a HELIX product.


  • Up to 160 W RMS output power per channel into 2 Ω
  • “Pure Class GD” concept for outstanding sound quality combined with best possible efficiency
  • Extremely powerful 64 Bit “fixed point” Audio DSP
  • ACO – Advanced 32 Bit CoProcessor platform for system and DSP features like:
  • ISA (Input Signal Analyzer) and InputEQ for easy analysis and compensation of input signals
  • SFX sound effects – Augmented Bass Processing, StageXpander, RealCenter & Co.
  • High power 12-channel highlevel input with up to 32 V RMS input sensitivity and ADEP.3 circuit
  • Two processed RCA / Cinch outputs
  • 1 to 1 Input / Output Routing (IOR) – same number of highlevel inputs and amplifier outputs
  • Virtual Channel Processing (VCP) allows even more flexible configuration for highly complex sound systems
  • HELIX Extension Card slot (HEC) for additional input / output modules like Bluetooth® Audio Streaming, High Resolution Audio Streaming via USB etc.
  • Compact design with low heat dissipation thanks to extraordinary efficiency


Power RMS ≤ 1% THD+N

  • @ 4 Ohms 75 Watts per channel
  • @ 2 Ohms 120 Watts per channel

Max. output power per channel*

  • Up to 160 Watts RMS @ 2 Ohms

Amplifier technology

  • Pure Class GD


  • 6 x RCA/ Cinch
  • 12 x Highlevel speaker input
  • 1 x Optical SPDIF (12 – 96 kHz)
  • 1 x Remote In

Input sensitivity

  • RCA / Cinch max. 4 V or max. 8 V
  • Highlevel max. 16 V or max. 32 V

Input impedance RCA / Cinch

  • 12 kOhms

Input impedance high level

  • 9 – 33 Ohms or 20 kOhms


  • 12 x Speaker output
  • 2 x RCA / Cinch
  • 2 x Remote Out

Output voltage RCA / Cinch

  • 3 Volts RMS

Frequency response

  • 20 Hz – 22,000 Hz

DSP resolution

  • 64 Bit

DSP power

  • 295 MHz (1.2 billion MAC operations/second)

Sampling rate

  • 48 kHz

DSP type

  • Audio signal processor

Signal converters

  • A/D: AKM 32 Bit
  • D/A: AKM 32 Bit

Signal-to-noise ratio digital input

  • 107 dB (A-weighted)

Signal-to-noise ration analog input

  • 102 dB (A-weighted)

Distortion (THD)

  • < 0.015 %

Damping factor

  • > 70

Operating voltage

  • 10.5 – 16 Volts (max. 5 sec.down to 6 Volts)

Idle current

  • 700 mA

Max. remote output current

  • 500 mA


  • 2 x 30 A LP-Mini-fuse (APS)

Additional features

  • HEC slot, ADEP.3 circuit, Auto Remote switch, 32 Bit CoProcessor, Control Input