HELIX - M FOUR 4-channel amplifier with integrated active crossover | Car Amplifiers | Car Amplifiers | Car Audio | Audio & Video | Electronics & Computers | Makro Online Site
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HELIX - M FOUR 4-channel amplifier with integrated active crossover Product ID : HA14107
HELIX - M FOUR 4-channel amplifier with integrated active crossover

R 4,65742

UCount rewards  46574
Available online only
In stock
3 - 7 working days
Buy Now available only for delivery

Online Exclusive

This product is exclusive to online shopping and may only be purchased and returned online as it is not stocked in-store.


This is supplied by GridElectronics and may result in additional delivery fees.


If you like to rev up your front and rear speakers, the M FOUR will be exactly the right "tool" to do so. With generously 100 Watts RMS per channel into both 4 Ohms and 2 Ohms load this amp will heat up your voice coils in no time despite its super-compact dimensions. On the other hand the M FOUR stays totally cool thanks to the highly efficient Class D design topology. 3-channel or 2-channel configurations are possible as well, delivering up to 2 x 200 Watts RMS of clean and undistorted output power.

Needless to say that the M FOUR is equipped with a bunch of intelligent attributes like "start-stop capability" and our proprietary "ADEP" highlevel input so that it easily deals with all installation challenges of modern cars. Finally the extensive audio features will offer a sound quality at its best.


  • Small footprint Class D amplifier with high output power of 100 Watts RMS @ 4 and 2 Ohms load
  • Start-Stop capability down to 6V supply voltage
  • Smart highlevel input with ADEP circuit (Advanced Diagnostics Error Protection) and Auto Turn-On function
  • Integrated, active crossover with highpass, lowpass and bandpass
  • “Input mode” switch for flexible input signal routing
  • SMD (Surface Mounted Device) manufacturing technology combines minimum space requirement with maximum reliability
  • Exclusive, extremely compact and clean design with illuminated HELIX-logo and low heat dissipation thanks to extraordinary efficiency

Special features:

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 appear - but not with the M FOUR.
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.

Start-Stop capability

The switched power supply of the HELIX M FOUR assures operation even if the battery’s voltage drops down to 6 Volts during engine crank.

Technical data

Output power RMS / max.
- @ 4 Ohms4 x 100 / 200 Watts- @ 2 Ohms4 x 100 / 200 Watts- @ 1 Ohm-- bridged @ 4 Ohms2 x 200 / 400 Watts- bridged @ 2 Ohms- Max. output power per channel*Up to 135 Watts RMS @ 4 / 2 OhmsAmplifier technologyClass DInputs4 x RCA / Cinch
4 x Highlevel speaker input
1 x Remote InInput sensitivityRCA / Cinch 0.5 - 6 Volts
Highlevel 1.3 - 13 VoltsInput impedance RCA / Cinch20 kOhmsInput impedance highlevel9 - 33 OhmsOutputs4 x Speaker outputOutput voltage RCA / CinchSignal converter for digital inputFrequency response10 Hz - 30,000 HzBass boostHighpass15 Hz - 4,000 Hz adjustableLowpass40 Hz - 4,000 Hz adjustableBandpass15 Hz - 4,000 Hz adjustableSubsonicPhaseSlope high- / lowpass12 dB/Oct.Slope subsonic / lowpassSignal-to-noise ratio digital inputSignal-to-noise ratio analog input98 dB (A-weighted)Distortion (THD)0.05 %Damping factor100Operating voltage10.5 - 16 Volts (max. 5 sec. down to 6 Volts)Idle current1,100 mAFuse2 x 30 A Maxi-fuse (APX)Additional featuresActive, adjustable crossover, input mode switch, Start-Stop capability, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP)Dimensions (H x W x D)50 x 230 x 154 mm /
2.00 x 9.06 x 6.06”

* In typical multi-channel applications (2- / 3-way system + rear + subwoofer)

Product/Packaging Information
Product Weight
2.6 kg
Product Dimensions
38cm(L) x 18cm(W) x 8cm(H)
Shipping Weight
2.6 kg
Shipping Dimensions
40cm(L) x 22cm(W) x 12cm(H)