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
ResoNix Sound Solutions is the only Authorized Internet Retailer for Audiotec Fischer products.
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    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 HDMÂ 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.
    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.
    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.
ResoNix Sound Solutions is a company with a specialty in high-end car audio and automotive sound treatment that offers top quality products and services that provide superior performance in their respective categories. No gimmicks, no baseless claims, no nonsense. Constrained layer dampers, sound absorbers, decouplers, noise barriers, and car audio DSP tuning and consultation services are part of our line-up with a focus on data-backed, solutions-based products developed by professional enthusiasts, for enthusiasts.