HELIX 204 X-Over
If you like to rev up your front and rear speakers, the M FOUR will be exactly the right "tool" to do so. With generously 100 Watts RMS per channel into both 4 Ohms and 2 Ohms load this amp will heat up your voice coils in no time despite its super-compact dimensions. On the other hand the M FOUR stays totally cool thanks to the highly efficient Class D design topology. 3-channel or 2-channel configurations are possible as well, delivering up to 2 x 200 Watts RMS of clean and undistorted output power.
Needless to say that the M FOUR is equipped with a bunch of intelligent attributes like "start-stop capability" and our proprietary "ADEP" highlevel input so that it easily deals with all installation challenges of modern cars. Finally the extensive audio features will offer a sound quality at its best.
Features
- Small footprint Class D amplifier with high output power of 100 Watts RMS @ 4 and 2 Ohms load
- Start-Stop capability down to 6V supply voltage
- Smart highlevel input with ADEP circuit (Advanced Diagnostics Error Protection) and Auto Turn-On function
- Integrated, active crossover with highpass, lowpass and bandpass
- “Input mode” switch for flexible input signal routing
- SMD (Surface Mounted Device) manufacturing technology combines minimum space requirement with maximum reliability
- Exclusive, extremely compact and clean design with illuminated HELIX-logo and low heat dissipation thanks to extraordinary efficiency
Special features:
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 appear - but not with the M 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.
Start-Stop capability
The switched power supply of the HELIX M FOUR assures operation even if the battery’s voltage drops down to 6 Volts during engine crank.
Specifications
| Power RMS ≤ 1% THD+N @ 14.4 V | |
|---|---|
| - @ 4 Ohms | 4 x 100 Watts |
| - @ 2 Ohms | 4 x 190 Watts |
| - @ 1 Ohm | - |
| - bridged @ 4 Ohms | 2 x 380 Watts |
| - bridged @ 2 Ohms | - |
| Max. output power per channel* | Up to 240 Watts RMS @ 2 Ohms Up to 480 Watts RMS @ 4 Ohms bridged |
| Amplifier technology | Class D |
| Inputs | 4 x RCA / Cinch or 4 x Highlevel speaker input 1 x Remote In |
| Input sensitivity | RCA / Cinch: 1 - 8 Volts Highlevel: 2 - 16 Volts |
| Input impedance | RCA / Cinch: 8 kOhms Highlevel: 9 - 33 Ohms |
| Outputs | 4 x Speaker output |
| Output voltage RCA / Cinch | - |
| Signal converter for digital input | - |
| Frequency response | 10 Hz - 20.000 Hz |
| Bass boost | - |
| Highpass | 45 Hz - 400 Hz adjustable (can be turned off) |
| Lowpass | 45 Hz - 400 Hz adjustable (can be turned off) |
| Bandpass | - |
| Subsonic | - |
| Phase | - |
| Slope high- / lowpass | Highpass: 12 dB/Oct. Lowpass: 12 dB/Oct. |
| Slope subsonic | - |
| Slope subsonic / lowpass | - |
| Signal-to-noise ratio (A-weighted) | 99 dB @ full power |
| Distortion (THD @ 1 kHz, 1 W into 4 Ohms) | < 0.012% |
| Distortion (THD+N @ 1 kHz, 1 W into 4 Ohms) | < 0.02 % |
| Distortion (THD @ 100 Hz, 1 W into 4 Ohms) | - |
| Distortion (THD+N @ 100 Hz, 1 W into 4 Ohms) | - |
| Damping factor | 70 |
| Operating voltage | 10.5 - 16 Volts (max. 5 sec. down to 6 Volts) |
| Idle current | 1,100 mA |
| Fuse | 2 x 30 A LP-Mini-fuse (APS) |
| Power rating | DC 12 V ⎓ 70 A max. |
| Operating temperature range | -40 °C to +70 °C |
| Additional features | Active, adjustable crossover, input mode switch, Start-Stop capability, highlevel input with automatic turn-on function, ADEP.3, DirectDSP function |
| Dimensions (H x W x D) | 41.5 x 248 x 118 mm / 1.63 x 9.76 x 4.65” |
Installed by Audio Edge
We sell every product as part of a system designed for your vehicle — consultation, installation, and tuning included. Tell us what you drive and we’ll tell you what this can do in your car.
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