In Phase XTB-828R 8" 300W Active Subwoofer
427387

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In Phase XTB-828R 8" 300W Active Subwoofer
427387

£149.99 £129.99 save £20
Intervening prices may have been charged
Extra 5% off with Motoring Club Premium
Up to 20% OFF on a range of Inphase speakers
Clearpay now available. Buy now. Pay in 4.
  • Size: 8”
  • RMS power: 200W RMS
  • Peak power: 400W

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In Phase XTB-828R 8" 300W Active Subwoofer
In Phase XTB-828R 8" 300W Active Subwoofer
£149.99 £129.99 save £20
Intervening prices may have been charged

In Phase XTB-828R 8" 300W Active Subwoofer 

  • Sealed sub enclosure with passive radiator tech and 400W Class D amplifier.
  • Delivers low, accurate bass with a compact footprint and high-level input support.

The In Phase XTB-828R is a unique active subwoofer enclosure that combines sealed passive radiator technology with a high-powered Class D amplifier to deliver controlled and impactful bass.

Featuring an 8” all-weather glass fibre woven cone and a passive radiator, this subwoofer achieves deep and accurate low frequencies that surpass standard active subwoofer setups.

Its built-in 400W Class D amplifier offers strong, efficient power delivery and includes tuning options for optimal system integration.

The unit supports both high-level and low-level inputs, allowing for compatibility with a wide range of head units, including OEM systems.

Its compact four-in-one design maximises performance while minimizing enclosure size, ideal for vehicles with limited space.

A full installation wiring kit is provided (RCA cables not included), making the XTB-828R a practical solution for a high-quality bass upgrade.