HiFi Subjectivist ¦ Audio Forum ¦ NVA User Group

Alan Elsdon in the late 1970,s used concrete tube for road drain and mounted Lowther driver in them they sounded amazing.

Yeah it looks like a few companies have dabbled with concrete speakers over the years. I would imagine transporting them economically and without damage has made them an unviable commercial option.

I seem to remember someone (many years ago) using a toilet pan with a Kef B139 mounted where the seat would fit and using the waste pipe outlet as a sort of transmission line.

Best place for a B139.

Didn’t Townsend do some concrete speakers?

From a quick google search yes I think they did. A few have tried it over the years. It will be interesting to see how the concrete cabinets work along side the docs speaker principles.

Just a quick update. I should hopefully be popping to see a metal fabricator today to see if they can make me a steel mould for casting the panels and I am also looking into the possibility of making or having someone make a rubber casting mould. If the rubber moulds are reasonably priced then they will be the way forward.

Rubber? Liquid concrete, even in small amounts is capable of exerting a lot of pressure, as many carpenters have found to their cost! Even if it only pushes the middle out a mm or so it will look shit. I'd go for steel if you can afford it.

Zebbo , this is what I was thinking of...

https://youtu.be/LZbikO7HUrE