Helix M FOUR – 4 Channel Class D Amplifier With Integrated Active Crossover

Helix M FOUR 4 Channel Class D Amplifier

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 High Level 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.

Technical Data

• Output power RMS ≤ 1% THD+N
• @ 4 Ohms 4 x 100 Watts
• @ 2 Ohms 4 x 100 Watts
• @ 1 Ohm
• bridged @ 4 Ohms 2 x 200 Watts
• bridged @ 2 Ohms
• Max. output power per channel* Up to 135 Watts RMS @ 4 / 2 Ohms
• Amplifier technology Class D
• Inputs
  • 4 x RCA / Cinch
  • 4 x Highlevel speaker input
  • 1 x Remote In
• Input sensitivity
  • RCA / Cinch 0.5 – 6 Volts
  • Highlevel 1.3 – 13 Volts
• Input impedance RCA / Cinch 20 kOhms
• Input impedance highlevel 9 – 33 Ohms
• Outputs 4 x Speaker output
• Output voltage RCA / Cinch
• Signal converter for digital input
• Frequency response 10 Hz – 30,000 Hz
• Bass boost
• 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 98 dB (A-weighted)
• Distortion (THD) 0.05 %
• Damping factor 100
• Operating voltage 10.5 – 16 Volts (max. 5 sec. down to 6 Volts)
• Idle current 1,100 mA
• Operating temperature range -40 °C to +70 °C
• Fuse 2 x 30 A Maxi-fuse (APX)
• Power rating DC 12 V ⎓ 45 A max.
• Additional Features
  • Active, adjustable crossover, input mode switch, Start-Stop capability, highlevel input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP)
• Dimensions (H x W x D) 50 x 230 x 154 mm / 2.00 x 9.06 x 6.06”

In typical multi-channel applications (2- / 3-way system + rear + subwoofer)

Scope Of Delivery

• 1 x Amplifier HELIX M FOUR
• 1 x Mounting material
• 1 x Instruction manual