joe
11-20-2013, 05:06 PM
Hello all I have a pair of jbl en5 cabs loaded with e145 woofers they have been ported , to begin with , with jbls recommendation of using the 4"x4" port . but I have problems at high spl with keeping the woofer cone in control and tweaking around with a variety of ports tuning for that general range doesn't really help . the 80hz slider on my eq is the one that generates the most response from the woofer whereas 25 and 31.5 do almost nothing , and the sliders on either side of 80 hz have much less effect on spl , cone control, everything.
I generally run 80hz about 3 db up because it sounds good , if I play loud I have to cut back to 1.5 db up and if its flat out with the clipping lights blinking on something like "when the levee breaks" I may even have to cut 80hz down a few db .
I would have thought that a 40 hz port would ease the problem by bringing the response down in the frequency range but the only port that seems to help control the woofer at high levels is a small 2" port . This is all I have been able to come up with . I've effectively ported it for control at 80hz by trial and error and I let the lower frequencies fall where they may because no port anywhere in the tuning range of 40 hz ever made much audible difference anyway . 5 cubic foot ...
Do You have any suggestions ? that dont involve using a different woofer? I'm building another set of speakers but I would like to get the most out of these speakers as well . Thank You
I generally run 80hz about 3 db up because it sounds good , if I play loud I have to cut back to 1.5 db up and if its flat out with the clipping lights blinking on something like "when the levee breaks" I may even have to cut 80hz down a few db .
I would have thought that a 40 hz port would ease the problem by bringing the response down in the frequency range but the only port that seems to help control the woofer at high levels is a small 2" port . This is all I have been able to come up with . I've effectively ported it for control at 80hz by trial and error and I let the lower frequencies fall where they may because no port anywhere in the tuning range of 40 hz ever made much audible difference anyway . 5 cubic foot ...
Do You have any suggestions ? that dont involve using a different woofer? I'm building another set of speakers but I would like to get the most out of these speakers as well . Thank You