JBL Pro speakers advice wanted - Page 2

Yeah, the 2452H-SL is pretty awesome IMO. I've been tempted to try the TruExtent Berylliums in those drivers but I haven't forked over the money. I'd love to get some aquaplas'd beryllium or Mg diaphragms...or just some Everests.

I mention the 15TBX100 because it is a well known quantity. That 18Sound driver has slightly higher Le than I'd like and no indication of a shorting ring which IMO is a necessity for this duty. Of course used 2226's are always an option as are dual 12s below the 4722 horn.

That brings up another interesting possibility. You can actually get better horizontal directivity with the 4722's 15's side by side crossed around 650-700hz or dual pro 12's crossed 750-800hz. That is actually the best setup IMO. You get horizontal directivity control all the way down to about 500hz instead of only to about 700-800hz and the widening of the pattern is more gradual. IMO JBL doesn't do this for packaging reasons.

Edit: Another interesting option for a 15 would be the Faital Pro 15FH520. I have no experience with them but they look good on paper and are $290.

"That 18Sound driver has slightly higher Le than I'd like and no indication of a shorting ring which IMO is a necessity for this duty."

18 sounds calls them "demodulating rings". the driver has two that linearize inductance, which may be more important than its absolute level.
http://www.eighteensound.com/renderPdf.aspx?pid=203

cowan has tested the 15lw1401 against the 2226h in the same cab and in his estimation, "The 18 Sound drivers perform better than the JBLs."
http://www.cowanaudio.com/unity.html

A quick glane at both the impedance and FR graphs shows that the 18sound has a very decent inductance effect. Wish Mr. Cowan would elaborate more on how he prefers the 18sound over the JBL 2226.

You can always get a set of 8350s for surrounds, or a receiver with XT32

How close can one sit to these 4722N, absolute minimum distance?

I was told 11 feet.

You could put the money towards some separate amps. You could even get on ebay and grab some 2435HPL's. They are very similar to the 2431 that came in the 4622. It has a beryllium diaphragm which is the best material you can get. They usually sell for around $250-300 on ebay.

The only issue is that they might not be a 100% drop in replacement. They will be close. You would then have a few options. The cheapest/easiest would be for Audyssey (or other DRC) to eq the small differences. Next would be to use a separate DSP (MiniDSP or amp integrated DSP) to tweak the response, but still use the passive crossover. Finally, you could measure and either run a fully xover'd DSP setup or tweak the stock passive crossover.


I don't know of an actual distance that is acceptable, but there isn't anything exceptional about the 4722 that would be different from many other towers that have an array of midbasses. Of course you can't stick your head in the horn like with a Synergy horn, but it won't have issues like the 3732 3-way with that is extremely tall.

I've never heard 11ft for the 4722, just for the 3-way screenarrays. I'd ballpark closer to 7-8ft. I'm not saying you are wrong, it is just that I've heard 11ft for the 3-ways and I'd assume those need more distance.

Hey that is even better, I won't disagree! I know I sat 13 feet from the massive 4675c-LF's and they worked great!

I've heard several horns now and they all sound better as you sit further away, in the 12-17' range.

I'd love some of the better horns for my 4645+8340 frankencombo. The 8340 have something like the 2412 CD that is used in about a dozen of the more budget JBL lines.

"Now I just need to figure out what component to spend that $3,000 on that I will be saving."

amps and drivers for your subs. :-)

Send those all over to me for ....uhh.... quality control. Yes. That's the ticket.

WOW. I am the seller of the set in which the original poster was talking about buying. I was researching some details and have found every scammer on the planet, from US, to Canada, to the UK, and Russia has copied my photos, ad details, etc and posted them for $2,000 to $2,200 all over. Geez, unless you know the seller, they ALL appear to be scams.

I would sell this entire set (16 speakers) for $3,750 to the one that can pick it up. Smokin' deal if you ask me, but I am biased.

Dan, aka porschecab, aka porschecabATcomcastDOTnet

That is a smokin deal Dan! I drove 12 hours, one-way, to pick up my three 4622's. They were $415 each. Then I found my 5749 locally for $450. I love a good value! 5749.jpg 433k .jpg file