Helix V TWELVE DSP MK2 – 12-channel DSP amplifier for premium factory systems
The V TWELVE DSP MK2 is a multi-channel amplifier with integrated DSP from the HELIX V series, developed for upgrading premium OEM sound systems. Despite 12 amplifier channels and 14 DSP channels, the housing has roughly the footprint of two envelopes. Its 12 highlevel inputs match the 12 speaker outputs, enabling 1:1 input-to-output routing in extensive factory systems. Made in Germany.
Key technologies include the proprietary Pure Class GD amplifier, whose supply voltage tracks the input signal to cut idle losses, combined with a fully differential signal path and improved output filter; BurrBrown converters for low distortion; and the 32-bit ACO co-processor that manages monitoring, PC-Tool communication, ten sound setups and firmware updates. Sound tuning features include the Input Signal Analyzer with 12-channel Input EQ, TuneEQ, Virtual Channel Processing, RealCenter and Augmented Bass Processing.
Key Features
- 12 amplifier channels: 12 x 75 W RMS at 4 Ohm or 12 x 120 W RMS at 2 Ohm; up to 160 W RMS per channel at 2 Ohm in typical multi-channel use.
- 14-channel DSP: 64-bit fixed-point audio DSP at 295 MHz (1.2 billion MAC/s).
- 12 highlevel inputs with ADEP.3: OEM integration without fault messages or feature loss such as fader function.
- 1:1 input-to-output routing: matching input and output counts for straightforward factory system integration.
- Pure Class GD: signal-dependent supply voltage, fully differential signal path and improved output filter.
- ACO 32-bit co-processor: monitoring, PC-Tool communication, switching between 10 sound setups and native boot loader for firmware updates.
- Input Signal Analyzer and 12-channel Input EQ: analyzes and compensates the signal of factory radios.
- TuneEQ: automatic frequency response correction using a measurement microphone such as the MTK1.
- Virtual Channel Processing (VCP): multi-stage routing for mixing and splitting signals into multi-way systems, with freely assignable sound effects.
- SFX: RealCenter, Augmented Bass Processing and StageXpander.
- HEC slot and SCP: expansion for Bluetooth or high-res USB audio, plus the Smart Control Port for powered remote controls.
- Power Save Mode and start-stop capability: automatic standby and stable internal supply down to 6 V.
Inputs & Outputs
- 6 x RCA inputs, max. input sensitivity 4 or 8 V, input impedance 12 kOhm
- 12 x highlevel speaker inputs, max. input sensitivity 16 or 32 V, input impedance 9–33 Ohm or 20 kOhm
- 1 x optical S/PDIF input (12–96 kHz)
- 1 x remote input
- 1 x HEC slot for optional sources
- 12 x speaker outputs
- 2 x RCA outputs, output voltage 3 V
- 2 x remote outputs, max. remote output current 500 mA
Power & Amplifier Section
- 12 x 75 W RMS at 4 Ohm and 12 x 120 W RMS at 2 Ohm (≤1% THD+N)
- Up to 160 W RMS per channel at 2 Ohm in typical multi-channel applications
- Amplifier technology: Pure Class GD
- THD below 0.015%, damping factor above 70, frequency response 20 Hz–22 kHz
- SNR 107 dB (digital input) and 102 dB (analog input), A-weighted
- Fusing 2 x 30 A LP-Mini (APS); max. 80 A at 12 V DC; idle current 700 mA
DSP & Sound Tuning
- 64-bit fixed-point audio DSP, 295 MHz, 48 kHz sampling rate, 14 DSP channels
- BurrBrown 24-bit A/D and D/A converters
- Input Signal Analyzer (ISA) with 12-channel Input EQ
- TuneEQ: one measurement per channel or channel pair; parametric EQ adjusted in center frequency, Q and gain
- RealCenter: center derived from left/right content; remains silent if only one side carries signal (conventional methods merely drop it by 6 dB)
- Augmented Bass Processing: Dynamic Bass Enhancement (boosts lows at low and medium volumes, adjusts the subsonic filter) and SubXpander (subharmonics between 50 and 100 Hz)
- Configured via the HELIX DSP PC-Tool
Installation & Connectivity Notes
- Operating voltage 10.5–18 V (max. 5 s down to 6 V), start-stop capable
- Power Save Mode switches off the remote output after 60 s without signal and reactivates within about 1 s; adjustable or can be disabled in PC-Tool
- Automatic remote switch
- Compatible remotes listed: DIRECTOR CREATE, CONDUCTOR, DIRECTOR, URC.1, URC.3
- Compatible interfaces: HEC HD-Audio USB interface, BT HD Streamer; MATCH adapter harnesses PP-UNI 1.30 Toyota and PP-UNI 1.48 MB
- Operating temperature range −40 °C to +70 °C
Technical Specifications
| Power RMS ≤ 1% THD+N | |
| – @ 4 Ohms | 12 x 75 Watts |
| – @ 2 Ohms | 12 x 120 Watts |
| – @ 1 Ohm | – |
| – bridged @ 4 Ohms | – |
| – bridged @ 2 Ohms | – |
| Max. output power per channel* | Up to 160 Watts RMS @ 2 Ohms |
| Amplifier technology | Pure Class GD |
| Inputs | 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 highlevel | 9 – 33 Ohms or 20 kOhms |
| Outputs | 12 x Speaker output 2 x RCA / Cinch 2 x Remote Out |
| Output voltage RCA / Cinch | 3 Volts |
| 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: BurrBrown 24 Bit D/A: BurrBrown 24 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 – 18 Volts (max. 5 sec.down to 6 Volts) |
| Power rating | DC 12 V ⎓ 80 A max. |
| Idle current | 700 mA |
| Max. remote output current | 500 mA |
| Operating temperature range | -40 °C to +70 °C |
| Fuse | 2 x 30 A LP-Mini-fuse (APS) |
| Additional features | HEC slot, ADEP.3 circuit, Smart Control Port, Auto Remote switch, 32 Bit CoProcessor |
| Dimensions (H x W x D) | 44 x 220 x 220 mm / 1.73 x 8.66 x 8.66“ |
* In typical multi-channel applications (2- / 3-way system + rear + subwoofer)
Scope of Delivery
1 x Amplifier HELIX V TWELVE DSP MK2
1 x Control Input-to-SCP adaptor
1 x USB cable
2 x Allen key
1 x Mounting material
1 x Instruction manual
