Helix M ONE X

Helix M ONE X – Compact Class D Mono Subwoofer Amplifier

The M ONE X is a compact monoblock for subwoofers based on current Class D technology. It drives 1-Ohm loads, and its current capability suits 2 x 2-Ohm subwoofers with parallel-wired voice coils. Its extensive feature set and small dimensions make installation straightforward.

Special highlights are the smart high-level input with the ADEP circuit (Advanced Diagnostics Error Protection), which prevents diagnostic error messages and loss of functions such as fader control in OE radios without unnecessarily loading the radio’s speaker outputs at high volume, and TwinPower Link, which combines two amplifiers in bridged mode into one powerhouse.

Key Features

• High output: 400 W RMS at 4 Ohms, 700 W RMS at 2 Ohms and 1,030 W RMS at 1 Ohm; up to 1,180 W RMS at 1 Ohm in typical subwoofer applications
• TwinPower Link: two amplifiers combined in bridged mode deliver 1,400 W RMS at 4 Ohms or 2,060 W RMS at 2 Ohms
• Smart high-level input with ADEP: avoids diagnostic errors and loss of functions with OE head units
• Automatic turn-on: via the high-level input
• Integrated active crossover: low-pass, band-pass, subsonic filter and phase control
• Bass boost: 0–12 dB, 30–80 Hz
• Bass remote control: cable remote for subwoofer volume included
• Start-stop capability: the switched-mode power supply keeps the amplifier running when the battery voltage drops to 6 V during engine cranking
• SMD construction: surface-mounted device technology
• Class D efficiency: low heat dissipation thanks to high efficiency

Inputs & Outputs

• 2 x RCA inputs
• 2 x high-level speaker inputs
• 1 x remote input
• 1 x remote control input
• Input sensitivity: RCA 0.5–6 V, high-level 1.1–13 V
• Input impedance: RCA 20 kOhms, high-level 9–33 Ohms
• 1 x speaker output

Power & Amplifier Section

• 1 x 400 W RMS at 4 Ohms (≤1% THD+N)
• 1 x 700 W RMS at 2 Ohms (≤1% THD+N)
• 1 x 1,030 W RMS at 1 Ohm (≤1% THD+N)
• Maximum output: up to 1,180 W RMS at 1 Ohm (typical subwoofer application)
• TwinPower Link (two amplifiers): 1,400 W RMS at 4 Ohms, 2,060 W RMS at 2 Ohms
• Amplifier technology: Class D
• Frequency response: 10–250 Hz
• Signal-to-noise ratio: 95 dB (A-weighted)
• THD: 0.20%
• Damping factor: 150
• Fuses: 3 x 40 A Maxi fuse (APX); power rating 12 V DC, 106 A max.

DSP & Sound Tuning

• Low-pass filter: 50–250 Hz, adjustable
• Band-pass: 10–250 Hz, adjustable
• Subsonic filter: 10–50 Hz, adjustable
• Slopes: subsonic 12 dB/oct., low-pass 24 dB/oct.
• Bass boost: 0–12 dB, 30–80 Hz
• Phase: 0–180°, adjustable

Installation & Connectivity Notes

• Operating voltage: 10.5–16 V, for max. 5 seconds down to 6 V
• Idle current: 800 mA
• Operating temperature range: −40 °C to +70 °C
• SRC.1-MK2 subwoofer remote control is listed as an accessory on the product page

Technical Specifications

* In typical applications as subwoofer amplifier

Scope of Delivery

1 x Amplifier HELIX M ONE X
1 x Cable remote control
1 x Mounting material
1 x Instruction manual