I've heard that the large woofers from 10 inches or larger will produce a rich/full, or, in the worst case, dull voice if their crossovers are set at above 300 Hz. Is this true?
I see many commercial speakers, such as the JBL L100, JBL L96, etc., have a high low-pass frequency. However, these JBLs, if I'm correct, use woofers as a full-range. So, this may not be relevant.
I see many commercial speakers, such as the JBL L100, JBL L96, etc., have a high low-pass frequency. However, these JBLs, if I'm correct, use woofers as a full-range. So, this may not be relevant.
Usually, increasing cone area (piston diameter) increases the Mms and lowers the highest frequencies that may be correctly reproduced by a driver. Further, there are issues regarding cone breakup and beaming that limit the use of woofers as voice reproducers.
However, there are many factors such as cone material / rigidity, cone geometry etc. that can improve the voice / midrange coming out of a woofer. The following (towards the end) has a brief explanation of the various cone properties of LF drivers, that might help.
https://www.cieri.net/Documenti/JBL/Technical Notes/JBL Technical Note - Vol.1, No.3A.pdf
However, there are many factors such as cone material / rigidity, cone geometry etc. that can improve the voice / midrange coming out of a woofer. The following (towards the end) has a brief explanation of the various cone properties of LF drivers, that might help.
https://www.cieri.net/Documenti/JBL/Technical Notes/JBL Technical Note - Vol.1, No.3A.pdf
Can anybody please provide the guidance to the LINKS…to the JBL TECHNICAL MANUALS../ speaker technical pages?
I have been “collecting” snap shots of the ones that I come across in the various threads… but I would like to also get the JBL L86, L96…and then whatever is next in that series…. L100 ?
I am curious to see how the crossover diagrams and the parts selection choices evolve as the models upgrade and evolve …
It appears that … In the 1970s and 1980s…. There were only a few mids ( a lot of LE5 variants) a few Tweets…
A few of each of the woofer sizes8”, 10” and 12”..
Box and baffle variations..
And then crossover networks from surprisingly primitive to a bit more elegant.
I attached a sample of what I am hoping to get access to….
Thanks.
I have been “collecting” snap shots of the ones that I come across in the various threads… but I would like to also get the JBL L86, L96…and then whatever is next in that series…. L100 ?
I am curious to see how the crossover diagrams and the parts selection choices evolve as the models upgrade and evolve …
It appears that … In the 1970s and 1980s…. There were only a few mids ( a lot of LE5 variants) a few Tweets…
A few of each of the woofer sizes8”, 10” and 12”..
Box and baffle variations..
And then crossover networks from surprisingly primitive to a bit more elegant.
I attached a sample of what I am hoping to get access to….
Thanks.
http://www.cieri.net/Documenti/JBL/Technical Notes/Tabella Technical Notes.htm
Try the Lansing heritage website.
Thank you very much…
I did find the Lansing Heritage site.. in which there was a thread listing many of the speakers in the thread title.. “JBL L86, JBL L96, JBL L100…”…
In that thread some one provided many links to MANY of the speaker technical sheets… which were mostly only the schematics for the crossovers with component values… and the speaker parts by name with most values … THAT …was the 95% solution…
My only additional wish …I can’t find the performance values for any of the woofers…so cross referencing woofers to “ similar “ but less expensive woofs… or for future planning ( box building ) … no joy.
So my next step will be to reference the other speaker parts suppliers like Madison and Simply Speakers to see what data I might be able to correlate .
Again…HERITAGE…is a good resource.
Thank you for the response.
Sample attached
I did find the Lansing Heritage site.. in which there was a thread listing many of the speakers in the thread title.. “JBL L86, JBL L96, JBL L100…”…
In that thread some one provided many links to MANY of the speaker technical sheets… which were mostly only the schematics for the crossovers with component values… and the speaker parts by name with most values … THAT …was the 95% solution…
My only additional wish …I can’t find the performance values for any of the woofers…so cross referencing woofers to “ similar “ but less expensive woofs… or for future planning ( box building ) … no joy.
So my next step will be to reference the other speaker parts suppliers like Madison and Simply Speakers to see what data I might be able to correlate .
Again…HERITAGE…is a good resource.
Thank you for the response.
Sample attached
https://www.audioheritage.org/vbulletin/forumdisplay.php?59-Transducer-Information
Cieri also got quite a few EDS files, or the jbl manuals.
Arhive.org
WHen it gets back up. Has a lot of 'buried info' that can be dug up with some time, patience and old website versions
