Love or hate speaker cabinets I made for Tannoy MG 15's

[RobbieGong]

Look fab !!

[drSM]

no question of hating them Denzil. i love them
well done !

[Macca]

They look superb. Amazing work. Great photos too. Looks like they are building them in a clearing in the rain forest.

[Denzil]

Stunning work, sir.

To a ham-fisted idiot like me living in the urban jungle - ie, no garden, no garage, three flights up - your handiwork is something I can only dream about.

The way you blended the cloth from the grille into the cabinet with that glorious retro logo .. it's simply gorgeous.

Beautiful stuff

Thanks Paul. Yes the cloth grill is properly integrated with the woodwork of the cabinet. It follows the curve of the wooden edge. May not be noticeable in the photos but the cloth is not flat, it's slightly curved.

Denzil

[Denzil]

Denzil,
I love the speakers, but I love your family resort even more - truly beautiful and an enduring part of your family's history.
Charlie

Thanks Charlie, you should come visit someday !

Denzil

[Denzil]

They look superb. Amazing work. Great photos too. Looks like they are building them in a clearing in the rain forest.

Thanks !

Yes, I do live in a heavily wooded area and the palms you see in the photos is an areca nut plantation around my home.

Denzil

[Denzil]

no question of hating them Denzil. i love them
well done !

Thanks !

Denzil

[Denzil]

Look fab !!

Thanks !

[Denzil]

If you block one of the ports it will lower the tuning frequency (stuff something in tight, like some socks). I modelled the 15" Monitor gold in your enclosure and it looks like you will get either a large peak at the tuning frequency, or a dip in the midbass area. It's impossible to know without measurements. If you stuff a port (or two) and find the bass heavy sound is gone then all is good, but if you find you also lose midbass then the enclosure is too big.

I'd also experiment with removing the material on the shelf. For ports to work efficiently, you want a free passage from the driver to the ports. Another thing I'd do is lightly fill the whole section below the ports to reduce standing waves (assuming you can). Polyester stuffing would do the job.

Yes, this is actually a work in progress. I was luck to finish building the cabinets just before lockdowns, etc. However whatever further experimental work I was to do has now come to a standstill. I was to remove the port pipes to check how it would sound like as a simple Aperiodic cabinet (with vents but no port tuning). And also as you suggested, check what it sounds like with no shelf felt, to work like a simple ported cabnet. But I haven't had the opportunity to do that due to Covid restrictions. They are heavy, difficult cabinets to handle without sufficient help. I tried what you suggested, plugging one, two and all three ports. The bass reduces but the overall sound quality deteriorated a lot even with one port closed. I'm not sure why. It appears that these speakers really need to breathe. But once I experiment with removing the felt on the shelf. And also later with removing the tuning tubes, I'll let you know my observations. BTW, I'm a complete novice ! I did a couple of months of reading before I decided on this design. But I have no experience with speaker cabinet making whatsoever. I'll try and experiment with all you have suggested, post Covid 19 !

Thanks again for your feedback. Much appreciated.

Denzil

[Denzil]

This work exemplifies just how an individual as opposed to a mass producing company can pay much attention to the build quality of the cabinet and its damping. It would be prohibitively expensive for a company, and it also allows individual aesthetic choice.

That's true. They also need to consider size and weight when designing because of shipping costs going off the scale.

Regards,

Denzil