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Adastra Bluetooth Music System + 6.5" In-Ceiling Speakers (4 Pairs)

by Adastra
£199.00 (inc. VAT)


This Adastra Bluetooth Music System comes complete with 4 pairs of 6.5" in-ceiling speakers and is a cost-effective audio solution that brings high-quality music to all rooms in your home. 

Playing music in your across your house has never been easier; simply pair your smartphone or tablet to the Bluetooth amplifier and away you go! You can even pair your Amazon Alexa or Google Home and control the system with your voice 'Alexa play the radio'. Alternatively, you can plug a device straight into the Aux/TV input. 

Our Adastra Bluetooth Music System is quick and easy to install and has you streaming all of your favourite music in no time. The supplied Bluetooth amplifier is extremely compact and can sit in a cupboard, in the wall or even above the ceiling.

The 6.5" in-ceiling speakers sit flush-mount to the ceiling and are sure to bring high-quality music to your home. They feature a quick-fit design so you can get up and running in no time. 

Supplied with 50 metres of 2-core 2x24 speaker cable. 

Key Features

  • Ideal for kitchen, bedroom & lounge music
  • 8x 6.5" In-Ceiling Speakers
  • Bluetooth connectivity & TV/Aux input
  • Works with Alexa & Google Home
  • Supplied with speaker cable

What's Included?

  • 1x Bluetooth Stereo Amplifier (IW415B)
  • 8x 6.5" In-Ceiling Speakers (B421A)
  • 1x 50m 2-core 2x24 speaker cable (807047-50m)

See SPECIFICATION tab for technical specs



  • Power supply: 12Vdc, 2000mA (adaptor included)
  • Bluetooth version: 4.0
  • Minimum impedance: 4 Ohms per output
  • Speaker : outputs: 2 x L-/L+/R-/R+ screw terminals (Euroblock)
  • Auxiliary input: 3.5mm stereo jack
  • Dimensions: 124 x 40 x 27mm
  • Weight: 70g


  • Product Dimensions (mm): 80x229x229
  • Net weight (kg): 1.8
  • Colour: White
  • Cut-Out Dimensions (mm): 193
  • Diameter (mm): 229
  • Frequency Response (Hz): 60-20000
  • Impedance (Ohms): 8
  • Mounting Depth (mm): 74
  • Peak Music Power (W): 250
  • Peak Power W: 250
  • Power RMS (W): 50
  • Sensitivity (dBV/Pa): 89
  • Speaker Type: Ceiling
  • Tweeter (mm): 13

Adastra IW415B PDF File Download

Download the User Manual HERE