power amplifier HELIX C FOUR 4 chanel original resmi from german

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.

Output power RMS / max.
- @ 4 Ohms 4 x 150 / 300 Watts
- @ 2 Ohms 4 x 220 / 440 Watts
- @ 1 Ohm -
- bridged @ 4 Ohms 2 x 440 / 880 Watts
- bridged @ 2 Ohms -
Amplifier technology Class AB
Inputs 4 x RCA / Cinch
1 x Remote In
Optional via HDM 2 module:
2 x Optical SPDIF (28 - 96 kHz)
Input sensitivity RCA / Cinch 1 - 8 Volts
Input impedance RCA / Cinch 7.5 kOhms
Input impedance highlevel -
Outputs 4 x Speaker output
Output voltage RCA / Cinch -
Signal converter for digital input -
Frequency response 10 Hz - 80,000 Hz
Bass boost -
Highpass 15 Hz - 4,000 Hz adjustable
Lowpass 15 Hz - 4,000 Hz adjustable
Bandpass 15 Hz - 4,000 Hz adjustable
Subsonic -
Phase -
Slope high- / lowpass 12 dB/Oct.
Slope subsonic / lowpass -
Signal-to-noise ratio digital input -
Signal-to-noise ratio analog input 112 dB (A-weighted)
Distortion (THD) < 0.007 %
Damping factor > 100