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Helix H 400X 4 Channel Class D Car HiFi Subwoofer Amplifier High End Audio

The best of both worlds – extremely fast MOSFET driver circuits in Class A operation combined with enormously load-stable, power-potent “afterburners” in bipolar technology. This is the recipe for success for the particularly flat amplifiers, which, thanks to their sophisticated processor control, don’t get their feathers ruffled in any situation. Improved repeatedly over the years, these powerhouses with the characteristic and transparent enclosure covers have reached a sound level that is unrivalled, and not just in the value-for-money category.

Class-AB RCA-Input Active crossover SMD Made-in-Germany

Extremely stable amplifiers in an extraordinary shallow heatsink
Unique Bipolar output transistor technology for unparalleled natural and warm sound experience
Fastest drivers for lowest possible THD
Processor-controlled technology for optimized operation
Fully active crossover with highpass, lowpass and bandpass filter
"Input mode" switch for flexible input signal routing
RMI (Realmixed Input) for generating an optimised mono-summing signal from
  • the left and right channels
Smart protection circuits against overheating, over- and undervoltage, speaker short circuiting, low impedance and faulty connection
24 carat gold-plated solid connection terminals suitable for 25 mm² / gauge 4
Completely made in Germany by using only selected components

Output power RMS / max. 
- @ 4 Ohms4 x 70 / 140 Watts
- @ 2 Ohms4 x 125 / 250 Watts
- @ 1 Ohm- 
- bridged @ 4 Ohms2 x 250 / 500 Watts
- bridged @ 2 Ohms- 
Amplifier technologyClass AB
Inputs
4 x RCA / Cinch
1 x Remote In
Input sensitivityRCA / Cinch 0.7 - 8 Volts
Input impedance RCA / Cinch10 kOhms
Input impedance highlevel- 
Outputs4 x Speaker output
Output voltage RCA / Cinch- 
Signal converter for digital input- 
Frequency response20 Hz - 20,000 Hz
Bass boost- 
Highpass15 Hz - 4,000 Hz adjustable
Lowpass15 Hz - 4,000 Hz adjustable
Bandpass15 Hz - 4,000 Hz adjustable
Subsonic- 
Phase- 
Slope high- / lowpass12 dB/Oct.
Slope subsonic / lowpass- 
Signal-to-noise ratio digital input- 
Signal-to-noise ratio analog input110 dB (A-weighted)
Distortion (THD)< 0.009 %
Damping factor> 300
Operating voltage9 - 17 Volts 
Idle current2200 mA
Fuse2 x 25 A LP-Mini-fuse (APS)
Additional featuresActive, adjustable crossover, input mode switch,  Colour Protection System
Dimensions (H x W x D)
31.5 x 200 x 336 mm / 
1.24 x 7.87 x 13.23”

Delivery Contents 

1 x Amplifier HELIX H 400X
2 x Allen key
1 x Mounting material
1 x Instruction manual

We take great care packaging every item to ensure safe shipment to you. Our postage and courier charges not only cover the shipping cost, but also the time to pack your order, plus packaging supplies etc. PPlease note - some items may incur extra shipping charges that have to be sent by courier and are too large / expensive to be sent by Royal Mail (for example headlamps, headunits, speakers, lowering springs etc) to the following postcode areas, Channel Islands, BT, most IV, HS, KA-27-28, Any KW, AB30-56, FK17-99, G83, KW1-14, PA21-40, PH18-26, PH30-41, PH49-50, all ZE, IM, and any other non mainland postcodes.

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Helix H 400X 4 Channel Class D Car HiFi Subwoofer Amplifier High End Audio

  • Product Code: h 400x rm
  • Availability: In Stock

  • £579.00


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Tags: helix, 400x, channel, class, car, hifi, subwoofer, amplifier, high, end, audio, amplifiers