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View Full Version : Interesting and actually Clever speaker design


danilo
10-05-2017, 03:16
Lookit this:


http://danielballou.com/#cinder-speakers
Macca
10-05-2017, 07:19
Clever idea.
Audio Al
10-05-2017, 07:46
I would brick it if I was making them :)
YNWaN
10-05-2017, 07:49
We did exactly that a few years ago with a student - worked very well. There's not much point putting the port in the top section though.
struth
10-05-2017, 07:52
A breeze to use
walpurgis
10-05-2017, 08:00
Lookit this:


http://danielballou.com/#cinder-speakers

I'd be interested to know how the reflex port works, as once the front and rear panels are in place the cinder block privides two separate 'boxes' which are not linked as far as I can see.
RothwellAudio
10-05-2017, 08:36
There's not much point putting the port in the top section though.


I'd be interested to know how the reflex port works, as once the front and rear panels are in place the cinder block privides two separate 'boxes' which are not linked as far as I can see.

That's exactly what I thought when I saw the pictures.
rigger67
10-05-2017, 08:39
A breeze to use

Yes, and I think they could be the cornerstone of a decent system.
farflungstar
10-05-2017, 08:49
I'm sure I saw this done about 30 years ago.
walpurgis
10-05-2017, 09:14
I have all sorts of ideas for speakers. I've built around fifty pairs in the past. One thought that keeps crossing my mind, is a minimal energy storage full range horn. Built using a wire frame covered in hard doped paper. The whole enclosure maybe weighing a couple of kilos without driver. It may sound daft, but the principle has been used successfuly in the past.
Macca
10-05-2017, 11:32
We did exactly that a few years ago with a student - worked very well. There's not much point putting the port in the top section though.

Using a student is an even better idea than a breeze block, they are everywhere and inexpensive. I'd have liked to insert a reflex port into the one in front of me in the queue in the shop last night, buying £2.30 of 'munchies' and paying on his debit card.
danilo
10-05-2017, 16:10
C'mon .. LOOK at the animated gif
There you can see that the rear panel has a recess section
Thereby creating a Slot port betwixt lower concrete chamber and the top one.. Where the external port is located.
The designers are clearly Not idjits.
danilo
10-05-2017, 16:18
I have all sorts of ideas for speakers. I've built around fifty pairs in the past. One thought that keeps crossing my mind, is a minimal energy storage full range horn. Built using a wire frame covered in hard doped paper. The whole enclosure maybe weighing a couple of kilos without driver. It may sound daft, but the principle has been used successfuly in the past.

Speaker enclosures of 1" thick DOW insulation Foam. Very fast to build and of minimal costs. Ideal for testing one's designs.
Surprising bit is that the things sound Good! Wayyy better than idle speculation would infer.
Putting serious doubts into the "What Enclosure Material" Teapot tempest.

There is a fellow who makes / sells Exquisite Tractrix Horns out of Paper mache on his cnc molds.
Not inexpensive though ;)
YNWaN
10-05-2017, 17:09
Oh yes, routed out on the inside of the back panel.