Dear all,
I have a pair of beaten up JBL 4503A-1 enclosures...
Only five attachments per post so to be continued....
Dear all,
I have a pair of beaten up JBL 4503A-1 enclosures...
Only five attachments per post so to be continued....
And I have some nice 2445J 2" CD's on 2385a bi-radial horns...
That seem to measure really great...
I'm confident I can passively EQ the 2445J's and 2385a's to a really sweet 800hz high pass....
And the CD & horn will fit inside the cabinet above the woofer....
Plus I have some 2226's and E130's at a good price locally.....
So my question is would I even do this?
Any and all suggestions, ideas, past experiences, criticisms etc, etc are appreciated!
Cheers!
Just as an exercise in making the best sounding speaker system from your existing set of boxes and drivers? Put the 2226s in which ever pair of boxes is tuned the lowest. Put the E130s in the other pair of boxes. Plug up all unneeded holes for unused horns. Stack with the 2226 on the floor and the 130 box on top of that. Attach the horn driver combo to a board and to prop up the driver for aiming and set it atop the 130 box. Triamp with crossover points at 200 hz and 1khz. Tune to taste with the EQ in the DSP crossover. Oh, and strap the whole stack together if you plan to listen loud.
Originally Posted by Mazza
Funny you should ask Mazza;
I bought a pair of these boxes that had been hacked out to use a 2380/2446 and a 2226. They didn’t sound half bad.
I rebuilt the baffle board and loaded them with 2235’s, 2420’s on 2312’s with 2308 lenses and 2405’s. First passive them active.
They sounded better with the 2380’s, by far.
I am with Riley on this one.
Barry.
If we knew what the hell we were doing, we wouldn't call it research would we.
Hi Barry,
Thanks heaps for your input. Did you have a build thread for your restoration?
Thanks!
Thanks for your thoughts Riley.
I don't have quite the space to accommodate your suggestion but would be great for a concert outside no doubt!
Another idea I had was to do the cinema 2673 by rotating my cabs and mounting the 2385's on top???
I also found a supplier for the MA-15woofer clamps on eBay...
I'm a big fan of JBL 2" drivers for PA use. I can understand posts where people say they can be fatigued by them. I run mine thru 31 band eqs with different settings for each diaphragm used. I found one used driver went much higher than any other one I have.
Anyways, I would share again, that the Selenium drivers I got before sounded much sweeter to my ears. They didn't need much EQ. Might be perfect here?
They are mounted on EV horns BTW. I don't have any test equipment other than my ears.
(click this link)
JBL 2441 vs 2445 vs 2446 (audioheritage.org)
Look down the page just one post to see them posted by me.
If you do go with the older 2445 or especially lower quality diaphragms, some simple EQ settings can help your ears survive the onslaught.
I would state certain freq cuts like 1.2k, 2k, 4k, or boosts above 10k, but I feel like that wouldn't apply to every example. Having a good eq is a great way to keep your ears from harassment. I find the same cuts I have made in live performances, can still apply in my house. JBL 2" drivers seem to excel in certain freq, where they will fatigue your ears. So you may have to cut those to taste as needed. Start very small like 2 or 3 db at any offending freq.
I seem to like 2k down quite a bit, like 6db. If your EQ quality varies from mine, you may find any quoted numbers don't apply here. A EQ from Yamaha for example doesn't cut like some others IMO.
Once you start playing with the EQ, you may find you have to tune for each recording. Some like a tight jazz sound with mild midrange for most material, where some rock records will sound much different.
If you go from a Def Leppard cd to a Celine Dion, I wouldn't expect the same tuning to please all listeners.
I also should update that post, I have found the 2453 drivers are now my new desired driver. Until I get some new D2 drivers to test that is.
I moved the smaller 2432 drivers to monitors and are pleased in how accurate they are and how they cut thru. I'll always like the 2441, 2445, 2446, and 2450/1 drivers. Just tired of lugging them!
Sorry for the rambling. Love to talk drivers and learn more from experts.
Thanks for sharing your thoughts engineerjoe! Much appreciated.
Personnaly, would do two pairs. One better mannered using rebuilt 4331 cab with 2226/2445 (you've already shown the way you would do to extend its vhf response). The other pair using the E130/EV DH1A you have to make noise, and adding similar vhf eq to also extend its response. Then having two pairs for different purposes and making use of the gear you already have = increased flexibility.
Richard
Hi RMC,
Many thanks for your suggestions. I agree - more speakers = more happiness!
Unfortunately I only have the single EV CD/horn combo. I've long contemplated a killer centre channel with that HF section over a vintage 15" I also have in my stash....
Cheers!
Hi Mazza,
Yup, speakers = the more the merrier!
Big Celestion driver you have there, haven't seen this one before.
I'm not trying to steer you in a direction you don't want to go, however you only need a single EV combo to make another but different pair of boxes with your E130... Looks tempting to me. Other option maybe a subwoofer with the Celestion?
A killer centre channel has its merits, but on the other hand it involves integration work into a system, e.g. horn coverage pattern/directivity and possible overlapping issues, phase and acoustic centers, etc.
If you don't mind this extra work then why not. I sure won't blame you for that as i tend to like seeing people who show different things than the routine. Have fun.
Richard
For what it's worth I always felt the DH1a and it's variants sounded better than a 2445.
Mike Caldwell
www.mikecaldwellaudioproductions.com
That was my observation after having run about two dozen DeltaMax clone boxes as a B system for about a decade. The four boxes that had 2445s rather than the stock DH1s were clearly rather harsh sounding at high levels. The same sort of high mid harshness I've heard in JBL 2" drivers since starting out with 2440s on 2350 radial horns in the 70s. I think it's been widely noted that the phase plugs on both the 2440/41s and the 2445s were not as well thought out as some other 2" drivers. Sounded great with loud rock and roll where some kinds of distortion were a feature rather than a bug but less so in any other kind of music. JBLs one inch compression drivers were notably better in this regard. DH1s come up on Ebay fairly regularly if you want a match. Just avoid the low budget Chinese replacement EV diaphragms. You can go thru a dozen of those and not find a matching pair.
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