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Helix Amplify 204 Direct 4-Channel Amplifier with DirectDSP

Helix Amplify 204 Direct 4-Channel Amplifier with DirectDSP

The AMPLIFY 204 amplifiers combine four fully bridgeable outputs with outstanding sound quality and impressive performance – ideal for powerful front-end or multi-channel setups.
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Product Description

Whether as a classic 4-channel system, a 3-channel configuration with subwoofer, or a bridged 2-channel layout: the 204 adapts flexibly to a wide range of vehicles and system requirements. With an output of 4 x 100 watts RMS at 4 Ω, 4 x 190 watts RMS at 2 Ω, or 2 x 380 watts RMS bridged at 4 Ω, it delivers more than enough power for ambitious setups. 

Available as an X-OVER version with integrated active crossover or a DIRECT model optimized for pure signal transmission via external DSPs – always with a focus on superior sound performance.

Technical Data:

Power RMS  ≤ 1% THD+N @ 14.4 V 

  • @ 4 Ohms  4 x 100 Watts

  • @ 2 Ohms  4 x 190 Watts

  • bridged @ 4 Ohms 2 x 380 Watts

  • Max. output power per channel* Up to 240 Watts RMS @ 2 Ohms

Technical Features:

  • Amplifier technology Class D

  • Inputs 4 x RCA / Cinch

  • 1 x Remote In

  • Input sensitivity  1 - 8 Volts

  • Input impedance   67 kOhms

  • Outputs 4 x Speaker output

  • Output voltage RCA / Cinch 

  • Signal converter for digital input     

  • Frequency response  10 Hz - 20,000 Hz       

  • 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    Start-Stop capability, Clipping LED, DirectDSP inputs

  • Dimensions (H x W x D)  40 x 248 x 114 mm / 1.58 x 9.76 x 4.49”

 * One channel driven (≤ 10 % THD+N @ 14.4 V)*

Box Contents:

  • 1 x Amplifier HELIX AMPLIFY 204 DIRECT

  • 2 x Allen key

  • 1 x Mounting material

  • 1 x Connection cable

  • 2 x Fuse

  • 1 x Instruction manual