• Starting plugability down to 6V supply voltage
  • Intelligent high-level input with ADEP (Advanced Diagnostics Error Protection) circuitry
  • Integrated, active crossover with high pass, low pass, bandpass and bass boost
  • Extremely stable power amp with high current power transistors
  • Cable remote control for volume control of channels A and B
  • “Input Mode” switch for flexible distribution of input signals
  • High level input sensitivity up to max. 14 volts
  • 2-channel PreOut for connecting additional amplifiers
  • SMD (Surface Mounted Device) technology combines minimal space requirements with maximum reliability
  • Exclusive, compact design with illuminated HELIX logo
SKU: HA12109 Category: Tag:


The new G amplifiers are not only real powerhouses, but also combine innovative technology, great functionality and excellent sound characteristics with an absolute top price-performance ratio.

In addition to features such as the active crossover with high pass, low pass, bandpass and bass boost, the “Input Mode” switch for flexible distribution of input signals and the intelligent high-level input with ADEP circuit offers the G series with the start-stop capability an extraordinary feature in this price range. But that’s not all – a level remote control for subwoofer applications is also included.

Thus equipped, the realization of completely individual, sound and power-loaded Car Audio system concepts becomes child’s play. The HELIX-typical, compact and straight-lined design with the illuminated logo is also unmistakable.

Class-AB High Level Input ADEP RCA Input Remmote Control ready Active crossover Start-stop capability SMD


Special features:

Intelligent high-level input
Modern, factory-installed car radios are becoming increasingly intelligent in terms of diagnosing the connected speakers. If an amplifier is connected to the radio instead, it usually results in error messages up to the elimination of individual functions (such as faders). The new Advanced Diagnostics Error Protection (ADEP) circuitry eliminates all of these problems without unduly stressing the radio’s speaker outputs at high levels.

Start Plugability
The power supply in the HELIX G TWO amplifier ensures the internal power supply even with short-term drops down to 6 volts. This ensures that the HELIX G TWO remains fully functional even when the engine is started.



Power RMS / Max.


– @ 4 ohms

2 x 125/250 watts

– @ 2 ohms

2 x 200/400 watts

– @ 1 ohm

2 x 300/600 watts

– bridged to 4 ohms

1 x 400/800 watts

– bridged to 2 ohms

1 x 600 / 1,200 watts

amplifier technology

Class AB


2 x RCA 

2 x high level speaker input 

1 x remote In 

1 x remote control input

input sensitivity

RCA 1 – 6 volts 

high 2.5 – 14 volts

Input impedance RCA

30 kOhm

Input impedance high level

12 ohms


2 x speaker output 

2 x RCA

Output voltage RCA

1 – 6 volts RMS

Signal converter for the digital input


frequency range

10 Hz – 40,000 Hz

Bass Boost

0-12 dB / 45 Hz


15 Hz – 4,000 Hz adjustable


40 Hz – 4,000 Hz adjustable


15 Hz – 4,000 Hz adjustable





Slope high / low pass

Butterworth 12 dB / oct.

Slope Subsonic / Low Pass


Signal-to-noise ratio digital input


Signal-to-noise ratio analog input

106 dB (A-weighted)

Harmonic distortion (THD)


damping factor


operating voltage

9.6 – 16 volts (maximum 5 seconds down to 6 volts)

No-load current

1000 mA


2 x 30 A maxi plug-in fuse (FK3)

Additional features

Active adjustable crossover, bass boost, input mode switch, auto-engaged high level input and advanced diagnostic error protection (ADEP), start-up capability, remote control for volume control

Dimensions (H x W x D)

57 x 334 x 241 mm


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