Helix C Four 4-channel amplifier with lights on

Helix C Four 4-channel amplifier with top cover removed

Helix C Four 4-channel amplifier power input and rca input side panel with optical input added

Helix C Four 4-channel amplifier speaker output side panel

Helix C Four 4-channel amplifier power input and rca input side panel

Close up of a Helix C Four amplifier internals

Helix C Four - 4 Channel Amplifier

The Helix C Four is a high-end 4-channel amplifier designed for premium car audio systems. It delivers exceptional power and clarity across all channels, making it perfect for audiophiles who demand superior sound quality. Ideal for those looking to elevate their in-car listening experience.

220 watts x 4 @ 2-ohm
150 watts x 4 @ 4-ohm
440 watts x 2 @ 4-ohm when bridged

Custom Order ONLY. Call For Consultation Before Purchase – 269-737-6649

$1,800.00

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Precision Power for Audiophiles

Audiophile sound quality combined with impressive output power

The C FOUR is a high-end 4-channel amplifier that has been designed down to the last detail for ultimate sound quality. Audiotec Fischer’s proprietary ultra low-noise and ultra low-distortion Class A driver stage feeds a total of 32 hand-selected MOSFET power transistors, resulting in an incredible damping factor of 1,000 for relentless control of every loudspeaker. The intelligent regulation of the power supply assures stable conditions for the output stages and therefore phenomenal output power independent of the cars battery voltage.
In combination with the optionally available digital input module HDM 2, the C FOUR demonstrates the perfect transition to the digital era. The HDM 2 accepts digital audio signals up to 96 kHz sampling rate via its two optical inputs followed by cutting-edge BurrBrown D/A converters with 32 Bit resolution that transform the signals back to the analog domain. Therefore the C FOUR is absolutely future-proof and perfectly prepared for the combination with our digital signal processors.

Start-Stop capability

The switched power supply of the HELIX C Four assures operation even if the battery’s voltage drops down to 6 Volts during engine crank.

High-Resolution audio

The extremely broadband audio bandwidth of the amplifier ensures a lossless audio reproduction of High-Resolution audio content to provide the best possible sound in studio quality.

Extremely broadband Class AB amplifier with eight
selected MOSFET transistors per channel for exceptional sound quality – ideal for High-Resolution audio
Ultra low-noise and distortion-free power amp drivers in Class A technology
Enormous damping factor of 1,000 @ 4 Ohms for perfect speaker control
Optionally available HELIX Digital Input Module (HDM) to extend the amplifier with two optical digital inputs in SPDIF format
Integrated, active crossover with highpass, lowpass and bandpass
Regulated DC / DC switching power supply with Start-Stop capability down to 6V supply voltage
Microprocessor-based monitoring of amplifier status including temperature-dependent fan control
Input Mode switch for flexible routing of the input signals
Cutting-edge BurrBrown D/A converters with 32 Bit resolution in combination with the optional HDM 2 module
Massive 24-carat gold-plated power and speaker terminals
Quad-layer PCB with extra-solid 70μ copper traces for lowest possible losses and SMD (Surface Mounted Device) manufacturing technology