HELIX D FOUR
The new HELIX D amplifiers open new horizons in terms of price performance ratio. It is the first time that HELIX offers a lot of amplifier performance for such a low budget without neglecting the proved HELIX quality. Both power packs convince at first sight through high-quality processing in many details. The fine brushed aluminum heatsink and the stylish HELIX-logo make these models very attractive.
Smart highlevel input
The latest generation of OE car radios incorporates sophisticated possibilities of diagnosing the connected speakers. If a common amplifier will be hooked up failure messages and loss of specific features (e.g. fader function) quite often appears – but not with the D FOUR.
The new ADEP circuit (Advanced Diagnostics Error Protection) avoids all these problems without loading the speaker outputs of the OE radio during high volumes unnecessarily.
Special features:
| Output power RMS / max. | |
| – @ 4 Ohms | 4 x 65 / 130 Watts |
| – @ 2 Ohms | 4 x 90 / 180 Watts |
| – @ 1 Ohm | – |
| – bridged @ 4 Ohms | 2 x 180 / 360 Watts |
| – bridged @ 2 Ohms | – |
| Amplifier technology | Class AB |
| Inputs | 4 x RCA / Cinch 4 x Highlevel speaker input 1 x Remote In 1 x Remote control input |
| Input sensitivity | RCA / Cinch 0.5 – 6 Volts Highlevel 1 – 14 Volts |
| Input impedance RCA / Cinch | 30 kOhms |
| Input impedance highlevel | 12 Ohms |
| Outputs | 4 x Speaker output |
| Output voltage RCA / Cinch | – |
| Signal converter for digital input | – |
| Frequency response | 10 Hz – 50.000 Hz |
| Bass boost | 0 – 12 dB / 45 Hz |
| Highpass | 15 Hz – 4,000 Hz adjustable |
| Lowpass | 40 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 | 108 dB (A-weighted) |
| Distortion (THD) | 0.02 % |
| Damping factor | 65 |
| Operating voltage | 9.6 – 16 Volts |
| Current draw | 1000 mA |
| Fuse | 2 x 25 A Maxi-fuse (APX) |
| Additional features | Active, adjustable crossover, bass boost, input mode switch, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP), optional cable remote control |
| Dimensions (H x W x D) | 53 x 320 x 230 mm / 2.09 x 12.60 x 9.06” |