Adastra CSW8 8" Dual Coil Ceiling Subwoofer


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This ceiling speaker is fitted with an 8” sub-bass driver and 35mm voice coil.

The moulded plastic frame features 4 mounting ears providing secure fixing into mineral tiles or false ceilings.

Dual passive filters focus on low frequencies to ensure the efficient delivery of bass.

The 2 pairs of spring terminals can be connected together to provide a 4 Ohms subwoofer with 80W handling.

Alternatively, a stereo amplifier can be connected to each terminal with 8 Ohms load each up to 40W and then in parallel to left and right ceiling speakers to create a 2.1 system.

Installing close to ceiling edges or corners will add warmth and power to thin sounding ceiling speakers for full range background music delivery.


  • Low profile and space saving subwoofer

  • Dual coil for stereo connection

  • Coils can be paralleled for 4 Ohms operation

  • Dual passive filters for sub focus

  • Two spring-loaded terminal connections

  • Fitted with "dog-ear" mounts

Technical Specification

  • Driver: 200mmØ (8") coated paper

  • Voice coil: 35mmØ (dual wound)

  • Frequency response: 39 - 350Hz

  • Impedance: 2 x 8 Ohms or 1 x 4 Ohms

  • Power handling : rms: 2 x 40W or 1 x 80W

  • Power handling : max: 2 x 80W or 1 x 160W

  • SPL @ 1W/1m: 82dB

  • Dispersion: 155º

  • Connections: 2 pairs spring terminal

  • Cutout: 238mmØ

  • Mounting depth: 90mm

  • Magnet weight: 488g (17.2oz)

  • Dimensions: 101 x 271mmØ

  • Weight: 2.11kg


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