'Infinite baffle' is a general and not necessarily accurate term for a sealed box speaker. No open baffle in a room would be infinite. The nearest you could achieve would be mounting speakers in holes in the wall that are open to the outside environment (yes, it has been done).
Martin had a point earlier. Drive units designed for ported cabinets tend to have more powerful magnets than those for sealed boxes. Using them in a sealed box would likely produce an 'overdamped system', resulting in lost bass extension.
Paull Messenger the hi-fi bloke, he had some 15'' Tannoy DC mounted in the walls of his house, but they vented into the adjoining room instead of to outside. Still do the job, though.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.
Last edited by mikmas; 28-06-2018 at 18:29. Reason: missing 'n'
Back to the project for a moment.
The first step in constructing my cubes inevitably involved a cock-up. I set too jigsawing the openings in what would become the baffles but unfortunately somehow managed to fuck up the measurements and got the radius wrong (always double check .. and then check again )
As a consequence my stock of scrap 18mm was diminished ... so back to the graph paper to revise sizes. The cube would now have an external 27 x 27 x 27 provided I made baffles from a piece of 15mm laminated chipboard instead:
Last edited by mikmas; 28-06-2018 at 18:27.
The reason you have a cab is to imprison the rear wave, otherwise it comes out and you get cancellation between rear wave and front wave. The lower the frequency the more cancelation you get. That is the sole drawback of the open baffle principle. But it is quite a big one. There are work-arounds though.
If you put the B&W drivers in the centre of open baffles say 4 feet square you will get some bass out of them. The bigger you make the baffle the lower the bass will go.
Current Lash Up:
TEAC VRDS 701T > Sony TAE1000ESD > Krell KSA50S > JM Labs Focal Electra 926.
Yes. Bass will be compromised and deep bass missing altogether.
Open baffles are funny things. All suffer cancellation due to sound from the back of the cone meeting that from the front. This can be accounted for with equalisation to an extent, at the cost of sensitivity. But strangely some open baffles seem to work reasonably well without it.