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. Power RMS / max. 180 / 360 Watts Woofer diameter 10 / 250 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 40 – 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).