Helix C One 1 Channel Class AB High End Mono Subwoofer Amplifier 1x525w RMS

The Helix C One is a 1-channel Class AB mono subwoofer amplifier rated at 1 x 525W RMS into 4 ohms, rising to 1 x 1,100W RMS into 1 ohm. It is part of Helix's high-end C Series, featuring a Class A driver stage, a damping factor of over 1,000, and a frequency response extending to 80 kHz.

Two C One amplifiers can be combined via TwinPower Link for even more power. If you need a Class D alternative, the Helix M One is also available.

Key specifications

• Channels: 1 (mono), Class AB with Class A driver stage
• Power RMS: 1 x 525W @ 4 ohms, 1 x 830W @ 2 ohms, 1 x 1,100W @ 1 ohm
• TwinPower Link (two amps): 1 x 1,660W @ 4 ohms, 1 x 2,200W @ 2 ohms
• Frequency response: 10 Hz – 80 kHz
• Crossover: high-pass, low-pass and band-pass, 15 Hz – 4,000 Hz, 12 dB/oct
• Bass boost: 0 – 9 dB, 40 Hz – 120 Hz
• Signal-to-noise ratio: 120 dB (A-weighted)
• Damping factor: over 1,000
• Dimensions (H x W x D): 37.1 x 430 x 240 mm

The sound powerhouse: extremely powerful with stunning sound quality

The C One is a high-end 1-channel amplifier capable of driving even the most demanding subwoofers. Its ultra low-noise, ultra low-distortion Class A driver stage feeds 32 hand-selected MOSFET power transistors, delivering a damping factor of over 1,000 for precise loudspeaker control.

An intelligent regulated power supply maintains stable output conditions, keeping power delivery virtually independent of the car's battery voltage. Two C One amplifiers can be bridged via TwinPower Link for even greater output.

The C One is not purely a subwoofer amplifier. Its extended frequency response to 80 kHz and audiophile-grade architecture make it equally suited to heavy-duty midwoofers in high-end system builds.

With the optionally available digital input module HDM 1, the C One accepts digital audio signals up to 96 kHz sampling rate via an optical input, using BurrBrown D/A converters with 32-bit resolution. This makes it compatible with Helix digital signal processors.

Features

• Class AB amplifier with up to 1,100W RMS @ 1 ohm — ideal for 2 x 2 ohm subwoofers wired in parallel
• Usable as an ultra-broadband amplifier for high-resolution audio
• Ultra low-noise, distortion-free Class A power amp drivers
• Damping factor of 1,000 @ 4 ohms for maximum speaker control
• Optional Helix Digital Input Module (HDM 1) adds an optical SPDIF digital input
• Regulated DC/DC switching power supply with start-stop capability down to 6V
• Microprocessor-based amplifier monitoring with temperature-dependent fan control
• Integrated active crossover with high-pass, low-pass, band-pass, bass boost and phase control
• TwinPower Link for bridging two amplifiers
• BurrBrown D/A converters with 32-bit resolution (when used with optional HDM 1 module)
• Massive 24-carat gold-plated power and speaker terminals
• Quad-layer PCB with extra-solid 70μ copper traces and SMD manufacturing technology

Special features

Start-stop capability

The switched power supply keeps the C One operating even when battery voltage drops to 6V during engine crank.

High-resolution audio

The amplifier's extended audio bandwidth ensures lossless reproduction of high-resolution audio content.