I am looking arround to low frequency transducers like Focal Audiom 15ax.
Especially the values for Vas (635 L) and Cms (the driver's mechanical compliance = reciprocal of stiffness, in m/N) so as Qms are exceptionell large and the resonance frequency f-res is very low (22,8 Hz). This value is by the use of cloth surround instead rubber very noteworthy and an indicator for a very low weight (mass) of the diaphragm (cone).
All this features saves an unparalleled combination of clean and tight bass so as a very low bass at the same time, if the camber volume is appropriate therefore.
Drivers with similar parameters that I know are the follow:
- Cabasse 55ND
Cabasse haut-parleur 55ND
- HKM XX-21
(formerly WESTRA/TESLA, see attachement)
- 2x McCauley 6258
McCauley.com : Products: Components > 6258: Specifications
Unfortunately the Cabasse 55ND is too expensive and the HKM XX-21 has to strong variations between the individual devices.
From the McCauley 6258 I use two pieces in one chamber. Unfortunately in the meantime very expensive in Europe (and amazingly not in United States), now twice as expensive than 14 years ago by German's old distributor "Sirius".
Which additional currently available bass drivers in this size have similar parameters (as close as possible to the Audiom 15ax for use in large cabinets, i. e. VAS between 500-800L, f-res. below 25 Hz and Qms above 10)?
Thank you for any hints.
Especially the values for Vas (635 L) and Cms (the driver's mechanical compliance = reciprocal of stiffness, in m/N) so as Qms are exceptionell large and the resonance frequency f-res is very low (22,8 Hz). This value is by the use of cloth surround instead rubber very noteworthy and an indicator for a very low weight (mass) of the diaphragm (cone).
All this features saves an unparalleled combination of clean and tight bass so as a very low bass at the same time, if the camber volume is appropriate therefore.
Drivers with similar parameters that I know are the follow:
- Cabasse 55ND
Cabasse haut-parleur 55ND
- HKM XX-21
(formerly WESTRA/TESLA, see attachement)
- 2x McCauley 6258
McCauley.com : Products: Components > 6258: Specifications
Unfortunately the Cabasse 55ND is too expensive and the HKM XX-21 has to strong variations between the individual devices.
From the McCauley 6258 I use two pieces in one chamber. Unfortunately in the meantime very expensive in Europe (and amazingly not in United States), now twice as expensive than 14 years ago by German's old distributor "Sirius".
Which additional currently available bass drivers in this size have similar parameters (as close as possible to the Audiom 15ax for use in large cabinets, i. e. VAS between 500-800L, f-res. below 25 Hz and Qms above 10)?
Thank you for any hints.
Attachments
Last edited:
Mean you the Aggressor 6000 about this image URL's ?
http://www.bilderzumanziehen.de/bilda/aggressor_h.jpg
http://www.bilderzumanziehen.de/bilda/aggressor_s.jpg
http://www.bilderzumanziehen.de/bilda/aggressor_v.jpg
This loudspeker I had to check a few years ago. And I realized, that he had high mechanical and non linear losses (low value for Qms) probably cause poor material properties from surround and spider.
Thus the sound of the OMEGA sub woofer about
http://www.ms-technik.de/sub.htm
in the low level aera is bad and only useful (but not really good) by middle audible levels.
BTW - by chance I read about the URL
http://www.naimaudio.com/news/article/3395
http://www.focal.com/en/home-audio-loudspeakers/focal-jmlab/focal-and-naim.php
follow:
United by their passion for perfect sound, leading high-end audio brands Focal and Naim, today announce they are merging to create a new European leader in the audio industry. Focal & Co will own and manage Focal and Naim as independent brands, retaining their unique philosophies and product ranges.
and here the German version:
http://www.i-fidelity.net/news/deta...cal-ist-neuer-eigentuemer-von-naim-audio.html
Last edited:
are there any news?
check out also this thread:
http://www.diyaudio.com/forums/swap...-15ax-15-efficient-woofers-2.html#post3773360
check out also this thread:
http://www.diyaudio.com/forums/swap...-15ax-15-efficient-woofers-2.html#post3773360
Do you consider only 15" drivers or other sizes (12"/18")?
Do you only want actual driver productions or can also be discontinued replaceable models?
The surround has to be the same fabric surround or can it be made of different material like foam/rubber surround?
Your objective is?! The same internal volume/extension/SPL as the original, other... what's the net volume of the application and extension and SPL required (approximate).
One possible replacement of the same size would be the Fostex FW407/Fostex FW405.
Do you only want actual driver productions or can also be discontinued replaceable models?
The surround has to be the same fabric surround or can it be made of different material like foam/rubber surround?
Your objective is?! The same internal volume/extension/SPL as the original, other... what's the net volume of the application and extension and SPL required (approximate).
One possible replacement of the same size would be the Fostex FW407/Fostex FW405.
Actually the GPA 416-8B (16B) (not the GPA 416-8C) is a direct replacement with ~/-1.5dB. http://www.greatplainsaudio.com/
I am looking for all sizes. I am looking only for currently available driver (actual driver, as you say).
Most important things in geenral are follow (for large cabinets):
1) high value for VAS
2) high value for Qms (low Rms)
Precision Devices' PD184 match the requirements in most cases - go to
PD.184
But there are special situations with special requirements sometimes (e. g. lower sizes or extended frequency area up to 300 Hz etc).
Thus I want to have an extended overview (line-up) of the most exist and currently manufactured bass transducers on the marked in this kind.
The mentioned brands about
http://www.diyaudio.com/forums/mult...ew-website-through-trouble-vs-earthquake.html
could have also produce speakers in this kind, but there are no distributors in europe.
excellent advice - thank you very much;
very similar to this:
http://www.supravox.fr/anglais/haut_parleurs/400_2000_EXC.htm
Last edited:
I wouldn't call a field coil similar, but you can certainly regulate the power supply for the necessary adequate behavior.
Images from a subwoofer diy cabinet for 2x Focal Audiom 15ax you will find there:
http://www.diyaudio.com/forums/mult...-liters-equipped-2-pcs-focal-audiom-15ax.html
http://www.diyaudio.com/forums/mult...-liters-equipped-2-pcs-focal-audiom-15ax.html
There is a good replacement from SB Acoustics - check out post #18 under
https://www.diyaudio.com/community/...5ax-15-efficient-woofers.188915/#post-3773360