Near full range BMR (Balanced Mode Radiator)

[Hydrogen Alex]

Looks like a 4 or 4.5 inch BMR up top, not sure about the bass...?
The specs are garbage.... There is no way a 4 inch BMR ( or conventional driver) is 98dB sensitive @1 watt / 1 meter.
This makes me suspect the guy is a snake oil con man.

 

[Kjeldsen]

It's a vintage alnico paperconw tweeter

 

[Hydrogen Alex]

Please post a link to this driver, thanks.
Also please post a link showing that this is thedriver they use in this speaker, thanks.

 

[Kjeldsen]

I found it in the link already provided. Siemens 6Ruf

 

[Kjeldsen]

Please post a link to this driver, thanks.
Also please post a link showing that this is thedriver they use in this speaker, thanks.

Did you have the time too look. I think it's pretty rude to write such powerful statements without knowing what is actually in the speakers.

 

[TimbreAudio]

From the spec bit at the top.

"Full-range speaker: Bogen; 12-inch ultralight paper cone; AlNiCo roundmagnet

Tweeter: Siemens 6Ruf lsp28b; 4" ultralight paper cone; AlNiCo magnet from VAC Berlin"

 

[picowallspeaker]

Hhhmmm, definitevely not! They are advertised as vintage drivers in new boxes.
Full-range speaker
Bogen; 12-inch ultralight paper cone; AlNiCo roundmagnet

Tweeter
Siemens 6Ruf lsp28b; 4" ultralight paper cone; AlNiCo magnet from VAC Berlin

 

[Jason Shep]

Hi All,
I’ve been meaning to knock up some DolbyAtmos height channel speakers, using some BMR’s I’ve had kicking around for a while now.
I’d like to use two drivers per speaker but to get them close to the ceiling & angled downward, I’d need to arrange the drivers side by side, would it be better to make these a 1.5 way & only have one driver playing the high frequencies?

 

[mmu7x]

Last week, I experimented with impregnating for diffusers with a quartz nanopowder based composition. The result is very positive: the sound stage has become wider and deeper. If to compare directly with the speaker without impregnation, then there is less shouting on phonograms with high female vocals, violins and wind instruments.

Do you have or sell plans for these?

 

[TimbreAudio]

Does anyone think the new drivers from Purifi might be a good match for some high quality BMR's?

Their PTT6.5W04-01A has ultra low distortion and huge bass output for its size...

PTT6.5W04 - PURIFI

 

[perceval]

Looks nice, and seems to sim well in a MLTL.
That surround is funky.

They are us $350 each, plus shipping. Might be OK for Europe, but cost prohibitive anywhere else in the world.

Trouble is that most BMRs are about 80dBs, so you will need to pad that woofer if the 90+dBs is true.

 

[Alvipet]

Tectonics TEBM65C20F-8 sound good

 

[Alvipet]

Another one option for Tectonic Elements TEBM65C20F-8

 

[tamerlano]

Ci sono novità sugli speaker BMR? Ho trovato questo sito https://www.cotswoldsound.com/index.php Ma non ho trovato informazioni su come e dove acquistarli Trovo interessanti le caratteristiche dei modelli da 4,5 e 6,5 pollici e i prodotti sembrano relativamente nuovi in quanto l'ultimo aggiornamento è stato effettuato il 26 maggio 2024

 

[rayma]

Please post in English.

Is there any news on BMR speakers? I found this site https://www.cotswoldsound.com/index.php But I didn't find information on how and where to buy them. I find the features of the 4.5 and 6.5 inch models interesting and the products seem relatively new as the The last update was made on May 26, 2024

 

[jerryo]

I have a pair of the 6.5” drivers in an open baffle set up and find them very nice. Subwoofer for low frequencies under 150Hz

 

[Studley]

Very interesting to me that you are using them on an OB. Are you running them full range above 150hz ie no tweeters ?

 

[jerryo]

The QTS is given as 0.831 so I thought it worth a go as the alternative application, and only other application I have seen using this driver is a transmission line set up by ‘Curvi Speakers’a novel looking design but to big and complex to emulate.
No tweeter is used, but I’m quite happy with them. On going project when I have the time.

 

[tamerlano]

@jerryo
If it's not a problem could you say where you got them and at what price? What amplifier are you using?

 

[jerryo]

I ordered them directly from Cotswold Sound Systems, about four years ago. I use a variety of amps. Can’t remember how much they were. Over £100.00 a pair though.