Helix U 10A Underseat Sub Compact 10 Inch Active Subwoofer with Bass Remote

The Helix U 10A is a compact active underseat subwoofer featuring a 10 inch (250 mm) aluminium-cone driver and a built-in 180 W RMS Class AB amplifier in a flat die-cast aluminium housing. It is part of the Helix U-series active subwoofer range and ships with a cable bass level remote.

Key specifications

• Type: active underseat subwoofer
• Driver: 10" / 250 mm aluminium cone
• Amplifier power RMS / max: 180 / 360 W (Class AB)
• Inputs: 2 x RCA low-level, 2 x high-level speaker input with auto turn-on
• Low-pass filter: 50 to 150 Hz adjustable, 24 dB/oct
• Frequency response: 40 to 150 Hz
• Housing: die-cast aluminium
• Dimensions (H x W x D): 78 x 245 x 345 mm
• Remote: cable bass level control included

Helix U 10A

Where boot space is limited but the system needs more low-end, the U 10A fits under a seat and delivers proper bass without compromise. It connects to factory head units via the 2-channel high-level input with auto turn-on, or to aftermarket sources via the 2-channel RCA input.

• Integrated Class AB amplifier — 180 W RMS for punchy, controlled bass
• Low-resonance die-cast aluminium housing for precise bass reproduction and efficient heat dissipation
• Heavy-duty 10" / 250 mm driver with rigid aluminium cone and heat-resistant voice coil
• 2-channel high-level input with auto turn-on and 2-channel low-level RCA input
• Continuously adjustable steep-slope low-pass filter (50–150 Hz, 24 dB/oct)
• Sensitive phase adjustment for accurate integration with existing speakers
• Cable remote control for bass level adjustment included
• Flat housing design — suited to under-seat installation where space is at a premium

The adjustable high-slope low-pass filter and sensitive phase control let you match the U 10A precisely to the acoustics of your vehicle interior. If you need a DSP to fully tune the system, Helix offer options such as the Helix DSP Mini MK2 and the Helix DSP.3S for more advanced signal processing.