TruAudio SubTerrain Underground 10″ Subwoofer . This 10″ sub features a unique upfiring speaker, which allows you to install underground.

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RRP £1524 (INC VAT)

Bigger Volume
Maximum Airflow Port Tube – unique flared design at both ends optimizes airflow to generate maximum sound.

Deeper Bass
Balanced Dual Air Chambers – tuned specifically for its Bandpass enclosure and properly balanced to enhance performance of 10” injected poly driver for deep, rumbling bass.

Greater Sound Dispersion
Exclusive Soft Curve Cap – projects sound throughout the surrounding area rather than sending it back into the ground like other underground subs. 2,500+ square foot omnidirectional sound.

Smaller Footprint
Less Than 19” Long – Enjoy big, booming sound with the smallest landscape footprint in the industry.

Tech Tip: Before burying the sub, put gravel at the bottom of the hole for drainage, leveling and to help prevent freezing.


  • Colour: Yellow
  • Speaker Type: Underground subwoofer (passive)
  • Enclosure: Fiberglass reinforced plastic
  • Driver: 10″ injected polypropylene, long throw
  • Power: 20-250 watts internal amplifier
  • Inputs: 1. RCA L/R   2. LEF   3. High Level Input
  • Crossover: 40 – 200 Hz. continuously variable low pass
  • Frequency Response: 40-85 Hz +/-3db
  • Impedance: 4Ω
  • Cabinet DimensionsHeight: 28.7″ (729mm) x Width: 16.5″ (419mm) x Depth 13.4″ (341mm) x Length 18.9″ (480mm)


Spec Sheet


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