Helix M One Mono Subwoofer Amp 1 Channel Class D Amplifier up to 600w RMS 1 Ohm

The HELIX M ONE is a compact 1-channel Class D mono subwoofer amplifier from the HELIX M range, delivering up to 600W RMS at 1 ohm. It suits 2 × 2 ohm subwoofers wired in parallel and works with factory head units via its smart highlevel input with ADEP.

This listing is for the HELIX M ONE. The M ONE range is also available in a higher-power version: the HELIX M ONE X (1030W RMS at 1 ohm).

Key specifications

• Channels: 1 (mono), Class D
• Power @ 1 ohm: 600W RMS (1,200W max)
• Power @ 2 ohms: 410W RMS
• Power @ 4 ohms: 240W RMS
• Inputs: 2 × RCA, 2 × highlevel with ADEP and auto turn-on
• Crossover: lowpass 50–250 Hz, subsonic 10–50 Hz, bass boost 0–12 dB
• Dimensions (H × W × D): 50 × 230 × 154 mm
• Bass remote control included

HELIX M ONE 1-channel Class D amplifier

The M ONE is a highly compact monoblock designed for subwoofer use. Built on Class D technology, it handles 1 ohm impedance with ease, making it an ideal match for 2 × 2 ohm subwoofers wired in parallel. Its small footprint and minimal dimensions keep installation straightforward.

Features

• 600W RMS at 1 ohm — ideal for 2 × 2 ohm subwoofers connected in parallel
• Start-Stop capability with stable operation down to 6V supply voltage
• Smart highlevel input with ADEP (Advanced Diagnostics Error Protection) and auto turn-on
• 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) construction for compact size and maximum reliability
• Illuminated HELIX logo and low heat dissipation thanks to high efficiency

Smart highlevel input

Modern OE head units can diagnose connected speakers and often throw fault messages or lose features such as fader control when a standard amplifier is connected. The ADEP (Advanced Diagnostics Error Protection) circuit in the M ONE prevents these issues without placing unnecessary load on the head unit's speaker outputs at high volumes.

Start-Stop capability

The M ONE's switched-mode power supply keeps the amplifier running even when battery voltage drops to 6V during engine crank, making it fully compatible with Start-Stop vehicle systems.