This Jamo looks very interesting: not too wide baffle with 2 x 15" by side. They are crossed at 250 Hz and 2000 kHz. I think that the 15" are JAMO design (made by who?). The best alternative I was able to find was the BD15 bass driver (www.bd-design.nl).
An externally hosted image should be here but it was not working when we last tested it.
Very nice but a little pricey (1600-1700 € for two pairs!).
I want to know if they are other alternative to such drivers: good sensitivity,light membrane,... Beyma perhaps? Or the future Peerless SLS 400 SWR (830867) ?
Christophe
Try something from Ciare. Their 15.75Ndw2 for example has extremely low Rms, high Qms of just over 20!!! and high Cms. Look like hi-fi parametres in a PA driver 
. I have just ordered four 15.75Ndw1's.
Ciare 15.75Ndw2
. I have just ordered four 15.75Ndw1's.Ciare 15.75Ndw2
To me it sure looks like it indeed is a peerless SLS 400 woofer
http://www.audiokit.it/ITAENG/Altoparlanti/PeerlessDK/SLS400.htm
See the following link where in I speculate how the filtering is done to overcome the dipole drop. The series coil technique was originally used on the DALI skyline 2000 (and skyline 1000) dipole speakers as I recall it, where they used a high sensitivity cervin vega 15" respectively 12" woofer in a dipole configuration.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=68490&highlight=
http://www.diyaudio.com/forums/showthread.php?s=&threadid=64311
http://www.audiokit.it/ITAENG/Altoparlanti/PeerlessDK/SLS400.htm
See the following link where in I speculate how the filtering is done to overcome the dipole drop. The series coil technique was originally used on the DALI skyline 2000 (and skyline 1000) dipole speakers as I recall it, where they used a high sensitivity cervin vega 15" respectively 12" woofer in a dipole configuration.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=68490&highlight=
http://www.diyaudio.com/forums/showthread.php?s=&threadid=64311
cyclo said:
German distributor but you could also contact the french distributor: nsdistributino@wanadoo.fr
Hi,
The Peerless Qts is way to low to make any sense
in a passive OB speaker like the Jamo R909.
They will be very high Vas, low Mms, low Fs,
drivers BUT with a highish Q that tempers
sensistivity but means lots of excursion.
You can guarantee any high quality driver
designed for boxes won't work well in a OB.
Bizzarely cheap big drivers can suit OB's well.
The Jamo drivers are bespoke versions, not
a chance they will ever be sold for DIY use.
rgds, sreten.
The Peerless Qts is way to low to make any sense
in a passive OB speaker like the Jamo R909.
They will be very high Vas, low Mms, low Fs,
drivers BUT with a highish Q that tempers
sensistivity but means lots of excursion.
You can guarantee any high quality driver
designed for boxes won't work well in a OB.
Bizzarely cheap big drivers can suit OB's well.
The Jamo drivers are bespoke versions, not
a chance they will ever be sold for DIY use.
rgds, sreten.
Last edited:
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