Helix C Four
Audiophile sound quality combined with impressive output power.
4 x 150w RMS @ 4 ohm.
Special Order Only
Features
- 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
Special Order Only
Technical data
| Output power RMS ≤ 1% THD+N | |
| - @ 4 Ohms | 4 x 150 Watts |
| - @ 2 Ohms | 4 x 220 Watts |
| - @ 1 Ohm | - |
| - bridged @ 4 Ohms | 2 x 440 Watts |
| - bridged @ 2 Ohms | - |
| Max. output power per channel* | Up to 250 Watts RMS @ 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 | > 1000 |
| Operating voltage | 9 - 16 Volts (max. 5 sec. down to 6 Volts) |
| Idle current | 2400 mA |
| Operating temperature range | -40° C to +70° C |
| Fuse | 3 x 30 A LP-Mini-fuse (APS) |
| Additional features | Active, adjustable crossover, HDM slot, input mode switch, High-Resolution audio, Start-Stop capability |
| Dimensions (H x W x D) | 37.1 x 430 x 240 mm / 1.46 x 16.93 x 9.45" |
* In typical multi-channel applications (2- / 3-way system + rear + subwoofer)
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