Helix C ONE

Helix C ONE – high-end mono Class AB amplifier

The HELIX C ONE is a high-end single-channel amplifier able to drive powerful subwoofers at full output: 525 W RMS at 4 Ohms, 830 W at 2 Ohms and 1,100 W at 1 Ohm, enough for two 2-Ohm subwoofers in parallel. With a frequency response up to 80 kHz and a sound-focused design, it is also suitable for heavy-duty midwoofers in audiophile setups.

A very low-noise, low-distortion Class A driver stage feeds 32 hand-selected MOSFET power transistors, giving a damping factor of 1,000. The regulated power supply keeps output power nearly constant despite battery voltage changes, TwinPower Link combines two C ONE amplifiers into one more powerful system, and the optional HDM 1 module adds an optical digital input with 32-bit BurrBrown D/A converters.

Key Features

• Up to 1,100 W RMS at 1 Ohm: Class AB design, suitable for two 2-Ohm subwoofers wired in parallel.
• Class A driver stage: very low-noise, low-distortion drivers feeding 32 hand-selected MOSFETs.
• Damping factor 1,000: at 4 Ohms, for tight control of any speaker.
• TwinPower Link: connects two amplifiers in bridged mode – up to 1,660 W at 4 Ohms or 2,200 W at 2 Ohms.
• Broadband capability: can also be used as a broadband amplifier for high-resolution audio, frequency response up to 80 kHz.
• Active crossover: integrated highpass, lowpass and bandpass (15 Hz – 4,000 Hz, 12 dB/octave), plus bass boost and phase control.
• Regulated power supply: DC/DC switching supply with start-stop capability down to 6 V.
• Optional digital input: HDM 1 module adds an optical S/PDIF input (up to 96 kHz) with 32-bit BurrBrown D/A converters.
• Microprocessor monitoring: amplifier status monitoring with temperature-controlled fan.
• Premium construction: thick 24-carat gold-plated power and speaker terminals, quad-layer PCB with 70 μm copper traces in SMD technology.

Inputs & Outputs

• Inputs: 2 x RCA/Cinch (sensitivity 0.5–8 V, input impedance 7.5 kOhms)
• Inputs: 1 x remote in, 1 x remote control input, 1 x TwinPower Link
• Optional via HDM 1: optical S/PDIF input (up to 96 kHz)
• Outputs: 1 x speaker output

Power & Amplifier Section

• 525 W RMS at 4 Ohms, 830 W RMS at 2 Ohms, 1,100 W RMS at 1 Ohm (≤1 % THD+N, single amplifier)
• TwinPower Link (two amplifiers): 1,660 W RMS at 4 Ohms, 2,200 W RMS at 2 Ohms
• Max. output power up to 1,320 W RMS at 1 Ohm in a typical subwoofer application
• Amplifier technology: Class AB with Class A driver stage
• Damping factor above 1,000; frequency response 10 Hz – 80,000 Hz
• Regulated DC/DC power supply with start-stop capability down to 6 V
• Microprocessor-based status monitoring with temperature-dependent fan control

DSP & Sound Tuning

• Highpass, lowpass and bandpass filters, each adjustable 15 Hz – 4,000 Hz, slope 12 dB/octave
• Bass boost 0–9 dB, adjustable 40–120 Hz
• Phase adjustable 0–180°

Installation & Connectivity Notes

• Operating voltage 9–16 V; max. 5 seconds down to 6 V
• Fusing: 3 x 30 A LP-Mini fuse (APS)
• Accessories listed by the manufacturer for this model: HDM 1 – C ONE digital input module, SRC subwoofer remote control and SRC.1 MK2 subwoofer remote control
• Operating temperature range -40 °C to +70 °C

Technical Specifications

* In typical applications as subwoofer amplifier

Scope of Delivery

1 x High-end amplifier HELIX C ONE
2 x Allen key
1 x Mounting material
1 x Instruction manual