Audio amplifier Helix D FOUR, 360W

4-channel audio amplifier with integrated active crossover.

• Power RMS/MAX:
  @ 4 ohms 4 x 65 / 130W
  @ 2 ohms 4 x 90 / 180W
  @ 1 ohm - / -
  - Bridged @ 4 ohms 2 x 180 / 360 W
  - By bridge @ 2 ohms - / -
• Frequency range: 10 Hz - 50 kHz
• Sensitivity: 108 dB
• Damping factor: > 65
• Dimensions: 53 x 320 x 230 mm

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 proven 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.

• 4-channel high- and low-level input
• Smart high-level input with ADEP circuit (Advanced Diagnostics Error Protection) and Auto Turn-On function
• Fully active crossover with highpass, lowpass, bandpass and bass boost
• Extremely stable MOSFET power supply
• "Input mode" switch for flexible input signal routing
• High level input sensitivity up to 14 Volts max.
• Cable remote control for volume adjustment of the channels C & D optionally available
• Massive aluminum heatsink for best cooling conditions

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 (eg fader function) appear quite often - 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.

• Amplifier technology Class AB
• Inputs 4 x RCA / Cinch
  4 x High-level speaker input
  1 x Remote In
  1 x Remote control input
• Input sensitivity RCA / RCA 0.5 - 6 Volts
• High level 1 - 14 Volts
• Input impedance RCA / RCA 30 kOhms
• Input impedance high level 12 Ohms
• Outputs 4 x Speaker output
• Output voltage RCA / RCA -
• 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, high-level input with automatic turn on function and Advanced Diagnostics Error Protection (ADEP), optional cable remote control

User Guide