Helix M ONE X sound amplifier, 1180W, adapted for a subwoofer

€313.95 EUR 397.95 €


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The M ONE X is a very compact monoblock for subwoofers. Built with the latest Class D technology, this small amplifier easily drives speakers with an impedance of 1 ohm.

  • 1x400W 4ohm RMS
  • 1x 700W 2ohm RMS
  • 1x1030W 1ohm RMS


Small, efficient and uncompromisingly stable - the M ONE X is a highly compact monoblock for subwoofer applications. Designed from the latest Class D technology, this tiny amp can easily control speakers with 1 Ohm impedance. Its current capability makes the M ONE X a perfect partner for 2 x 2 Ohms subwoofers, where both voice coils are connected in parallel. And for even more output power, two M ONE X amplifiers can be combined to one single powerhouse – thanks to the TwinPower Link.

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-DHighlevel-InputRCA-InputSupport-Control-readyADEPActive crossoverStart-Stop-CapabilitySMDUltra compact dimensionsTwinPower Link

  • Small footprint Class D amplifier with up to 1,180 Watts RMS output power @ 1 Ohm for easiest combination with all 2 x 2 Ohms subwoofers connected in parallel
  • Start-Stop capability down to 6V supply voltage
  • Smart high level input with ADEP circuit and Auto Turn-On function
  • Integrated, active crossover with lowpass, bass boost, subsonic and phase control
  • TwinPower Link for connecting two amplifiers in bridged mode
  • Bass remote control for volume adjustment
  • Low heat dissipation thanks to extraordinary efficiency

Special features:

Smart high level 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 (eg fader function) appear quite often - but not with the M ONE X.
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 X ensures operation even if the battery's voltage drops down to 6 Volts during engine cranking.

Power RMS ≤ 1% THD+N Normal operation
(One amplifier)
Master / Slave Mode
(Two amplifiers)
- @ 4 Ohms 1 x 400 Watts 1 x 1,400 Watts
- @ 2 Ohms 1 x 700 Watts 1 x 2,060 Watts
- @ 1 Ohm 1 x 1,030 Watts -
- bridged @ 4 Ohms - -
- bridged @ 2 Ohms - -
Max. output power per channel*: Up to 1,180 Watts RMS @ 1 Ohm
Amplifier technology Class D
Inputs 2 x RCA/Cinch
2 x High-level speaker input
1 x Remote In
1 x Remote control input
Input sensitivity RCA / Cinch 0.5 - 6 Volts
High level 1.1 - 13 Volts
Input impedance RCA / RCA 20 kOhms
Input impedance high level 9 - 33 Ohms
Outputs 1 x Speaker output
Output voltage RCA / RCA -
Signal converter for digital input -
Frequency response 10 Hz - 250 Hz
Bass boost 0 - 12 dB / 30 - 80 Hz
Highpass -
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 150
Operating voltage 10.5 - 16 Volts (max. 5 sec. down to 6 Volts)
Idle current 800mA
Fuse 3 x 40 A Maxi-fuse (APX)
Additional features Active, adjustable crossover, bass boost, phase shift, Start-Stop capability, high-level 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 320 x 154 mm /
2.00 x 12.60 x 6.06”

The M ONE X is a very compact monoblock for subwoofers. Built with the latest Class D technology, this small amplifier easily drives speakers with an impedance of 1 ohm.

  • 1x400W 4ohm RMS
  • 1x 700W 2ohm RMS
  • 1x1030W 1ohm RMS


Small, efficient and uncompromisingly stable - the M ONE X is a highly compact monoblock for subwoofer applications. Designed from the latest Class D technology, this tiny amp can easily control speakers with 1 Ohm impedance. Its current capability makes the M ONE X a perfect partner for 2 x 2 Ohms subwoofers, where both voice coils are connected in parallel. And for even more output power, two M ONE X amplifiers can be combined to one single powerhouse – thanks to the TwinPower Link.

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-DHighlevel-InputRCA-InputSupport-Control-readyADEPActive crossoverStart-Stop-CapabilitySMDUltra compact dimensionsTwinPower Link

  • Small footprint Class D amplifier with up to 1,180 Watts RMS output power @ 1 Ohm for easiest combination with all 2 x 2 Ohms subwoofers connected in parallel
  • Start-Stop capability down to 6V supply voltage
  • Smart high level input with ADEP circuit and Auto Turn-On function
  • Integrated, active crossover with lowpass, bass boost, subsonic and phase control
  • TwinPower Link for connecting two amplifiers in bridged mode
  • Bass remote control for volume adjustment
  • Low heat dissipation thanks to extraordinary efficiency

Special features:

Smart high level 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 (eg fader function) appear quite often - but not with the M ONE X.
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 X ensures operation even if the battery's voltage drops down to 6 Volts during engine cranking.

Power RMS ≤ 1% THD+N Normal operation
(One amplifier)
Master / Slave Mode
(Two amplifiers)
- @ 4 Ohms 1 x 400 Watts 1 x 1,400 Watts
- @ 2 Ohms 1 x 700 Watts 1 x 2,060 Watts
- @ 1 Ohm 1 x 1,030 Watts -
- bridged @ 4 Ohms - -
- bridged @ 2 Ohms - -
Max. output power per channel*: Up to 1,180 Watts RMS @ 1 Ohm
Amplifier technology Class D
Inputs 2 x RCA/Cinch
2 x High-level speaker input
1 x Remote In
1 x Remote control input
Input sensitivity RCA / Cinch 0.5 - 6 Volts
High level 1.1 - 13 Volts
Input impedance RCA / RCA 20 kOhms
Input impedance high level 9 - 33 Ohms
Outputs 1 x Speaker output
Output voltage RCA / RCA -
Signal converter for digital input -
Frequency response 10 Hz - 250 Hz
Bass boost 0 - 12 dB / 30 - 80 Hz
Highpass -
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 150
Operating voltage 10.5 - 16 Volts (max. 5 sec. down to 6 Volts)
Idle current 800mA
Fuse 3 x 40 A Maxi-fuse (APX)
Additional features Active, adjustable crossover, bass boost, phase shift, Start-Stop capability, high-level 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 320 x 154 mm /
2.00 x 12.60 x 6.06”