• U330810
  • DE 29323089


Bass is in the smallest hut – If mounting space in the vehicle is scarce and existing car hifi systems badly need the "extra kick" in the low frequency range without great effort, the new HELIX active subwoofers U 10A and U 8A are the right choice. Driven by powerful, integrated Class AB amplifiers with 180 W RMS, the heavy-duty drivers with their rock-solid aluminum cones and heat-resistant voice coils easily transform the amplifier power into punchy bass. Thanks to comprehensive setting options like the adjustable, high-slope lowpass filter and particularly sensitive phase control, the low frequency reproduction can be perfectly adapted to the acoustic conditions inside the vehicle. Equipped with a 2-channel highlevel input with automatic turn on function as well as a 2-channel lowlevel RCA input a seamless integration is guaranteed. And thanks to the especially shallow cabinet design the installation will be a no-brainer, especially if space is extremely limited – these small "bass boosters" may even fit under the seats, for example.


  • Powerful, integrated Class AB amplifier with 180 W RMS power for punchy bass
  • Solid and low-resonance diecast aluminium housing for precise bass reproduction and optimum heat dissipation 
  • Heavy-duty 8” / 200 mm chassis with extremely stable aluminum cone for compression-free transformation of the amplifier power into sound pressure
  • Integrated Class AB amplifier with 180 W RMS power
  • Continuously adjustable, steep-flanked lowpass filter
  • Particularly sensitive adjustment of the phase
  • Cable remote control for volume adjustment included in delivery
  • Especially flat housing design - ideal for space-saving under-seat mounting

Technical data

Power RMS / max. 180 / 360 Watts
Woofer diameter 8" / 200 mm
Inputs 2 x RCA / Cinch
2 x Highlevel speaker input
1 x Remote In
1 x Remote control input
Input sensitivity Highlevel 1.2 - 20 Volts
RCA / Cinch 0.3 - 4 Volts
Input impedance RCA / Cinch 10 kOhms
Input impedance highlevel 33 Ohms
Frequency response 45 - 150 Hz
Lowpass 50 - 150 Hz adjustable
Subsonic 16 Hz / 12dB/Oct.
Phase switch 0° / 180° switchable
Phase shift 0 - 180° adjustable
Slope lowpass 24 dB/Oct.
Signal-to-noise ratio > 92 dB (A-weighted)
Distortion (THD) < 0.4 %
Operating voltage 10.5 - 16 Volts
Fuse 25 A Maxi-fuse (APX)
Additional features Diecast aluminum housing, cable remote control for volume adjustment, Auto Remote switch 
Dimensions (H x W x D) 78 x 245 x 345 mm /
3.07 x 9.65 x 13.58"

Scope of delivery

1 x Active subwoofer HELIX U 8A
1 x Cable remote control
1 x Mounting material
1 x Instruction manual

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