A pair of reflex tubes care of eBay to create front-firing ports and a pair of 2-way terminal blocks fitted to the back and job's a good 'un: I also had a load of 9mm ply offcuts, so I decided to laminate this on the outside of the MDF to make a total thickness of 27mm, so the resultant box would be very stiff, and would also hide the rather unsightly MDF (and the crappy joints!). I'm making no great claims for the quality of construction here - the intent is a "proof of concept" - if they sound decent enough, a more considered build will follow. A quick rummage in the woodpile produced enough 18mm MDF of suitable dimensions to build the boxes - one part-built shown here, with internal (perforated) brace in place: The claimed FR when used in-wall goes down to 47 Hz, and the spec sheet from Tannoy suggests a cabinet volume of 25 Litres, so I played around with that as a starting point using one of the free speaker modelling apps and came up with a ported box that seemed like it might extend the bottom end a bit lower. First step was to build some cabs to mount them in.
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