Helix M One Mono Subwoofer Amplifier


Small, efficient and stable.



Available in

Online & Store

In stock

Product Enquiry
own it from $10/wklearn more »

The M ONE is a highly compact monoblock for subwoofer applications. Designed from latest Class D technology this tiny amp can easily control speakers with 1 Ohm impedance. Its current capability makes the M ONE a perfect partner for 2 x 2 Ohms subwoofers, where both voice coils are connected in parallel. In addition a comprehensive and stunningly practical feature set leaves nothing to be desired. Last but not least installation will be a no-brainer due to the minimal dimensions.

Class-D Highlevel-Input RCA-Input Remmote-Control-ready ADEP Active crossover Start-Stop-Capability SMD Ultra compact dimensions


  • Small footprint Class D amplifier with high output power of 600 Watts RMS @ 1 Ohm for easiest combination with all 2 x 2 Ohms subwoofers connected in parallel
  • 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 lowpass,bass boost, subsonic and phase control
  • Extremely stable output stage with high-current power transistors and 1 Ohm stability
  • Bass remote control for volume adjustment
  • 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 ONE. 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 ONE assures operation even if the battery’s voltage drops down to 6 Volts during engine crank.


Output power RMS / max.  
– @ 4 Ohms 1 x 240 / 480 Watts
– @ 2 Ohms 1 x 410 / 820 Watts
– @ 1 Ohm 1 x 600 / 1,200 Watts
– bridged @ 4 Ohms
– bridged @ 2 Ohms
Amplifier technology Class D
Inputs 2 x RCA / Cinch 2 x Highlevel speaker input 1 x Remote In 1 x Remote control input
Input sensitivity RCA / Cinch 0.5 – 6 Volts Highlevel 1.1 – 13 Volts
Input impedance RCA / Cinch 20 kOhms
Input impedance highlevel 13 Ohms
Outputs 1 x Speaker output
Output voltage RCA / Cinch
Signal converter for digital input
Frequency response 10 Hz – 250 Hz
Bass boost 0 – 12 dB / 25 – 75 Hz
Lowpass 50 Hz – 250 Hz adjustable
Bandpass 10 Hz – 250 Hz adjustable
Subsonic 10 Hz – 50 Hz adjustable
Phase 0 – 180° adjustable
Slope high- / lowpass
Slope subsonic / lowpass 12 / 24 dB/Oct.
Signal-to-noise ratio digital input
Signal-to-noise ratio analog input 95 dB (A-weighted)
Distortion (THD) 0.20 %
Damping factor 100
Operating voltage 10.5 – 16 Volts (max. 5 sec. down to 6 Volts)
Idle current 650 mA
Fuse 2 x 35 A Maxi-fuse (APX)
Additional features Active, adjustable crossover, bass boost, phase shift, Start-Stop capability, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP), bass volume cable remote control
Dimensions (H x W x D) 50 x 230 x 154 mm / 2.00 x 9.06 x 6.06”



1 x Amplifier HELIX M ONE 1 x Cable remote control 1 x Mounting material 1 x Instruction manual
0.0000 kg
cable type



Online, Store




3m, 5m, 8m, 12m


Helix M One





Brand Logo

Made in Germany, HELIX produces the most sophisticated car Hi-Fi components with its decades of experience.