JBL Pro speakers advice wanted - Page 3 - AVS Forum
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post #61 of 66 Old 07-05-2014, 04:10 PM
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I crossed all if them at 80hz which resulted in the flattest response there. My DR's go to 60hz in my baffle wall or 100 hz without.
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post #62 of 66 Old 07-06-2014, 05:58 PM
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I built the QSC 2150 and I built the SEOS Tempest. The QSC 2150 is a close match to the JBL however the QSC has a midrange. They both share 15" drivers and a CD. Either speaker would be great for a home theater. Any distance less than 8 ft should use the SEOS build. The 2150's play louder and slightly brighter, increasing my volume to 40 on my Denon 4311CI the tempests disappear due to the 2150's drowning them out. At reference the 2150's are an easy win. I also noticed that having more drivers and additional on tap power is awesome during explosions and shooting scenes. The larger theater speakers really fill the room. I will NOT have any itch to upgrade speakers anytime soon if ever. I added 2 more 2150's as "Wides" but I used a single 12" woofer instead of two 15" woofers.
Turn it up and enjoy the show.
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post #63 of 66 Old 07-07-2014, 04:38 AM
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Originally Posted by rlhaudio View Post
I built the QSC 2150 and I built the SEOS Tempest. The QSC 2150 is a close match to the JBL however the QSC has a midrange. They both share 15" drivers and a CD. Either speaker would be great for a home theater. Any distance less than 8 ft should use the SEOS build. The 2150's play louder and slightly brighter, increasing my volume to 40 on my Denon 4311CI the tempests disappear due to the 2150's drowning them out. At reference the 2150's are an easy win. I also noticed that having more drivers and additional on tap power is awesome during explosions and shooting scenes. The larger theater speakers really fill the room. I will NOT have any itch to upgrade speakers anytime soon if ever. I added 2 more 2150's as "Wides" but I used a single 12" woofer instead of two 15" woofers.
Turn it up and enjoy the show.
Can you tell us how the top end compared on the Tempest, 2150, and the JBL? Which had more detail & clarity? I would expect the Tempest would win those categories, but, I could be wrong.

What about vocals in movies? (not music) I would also expect the Tempest to win here as well due to it having a vetted compression driver than the QSC and JBL.
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post #64 of 66 Old 07-07-2014, 05:17 AM
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Originally Posted by coctostan View Post
Quote:Originally Posted by LTD02

good lord mr. c., i knew the 2452-sl large format compression driver was good, but 145db with midrange distortion less than 1% down to 300hz??? that's crazy.

http://www.audioheritage.org/vbullet...21706-2452h-sl

the 15tbx100 has relatively low sensitivity in its class and a nasty resonance at the top end. the 18 sounds version of that driver, the 15lw1401, might be better for a bespoke 4722 now that the 2226h price has shot to the moon.


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.
Does the 2435HPL come stock with a Be diaphragm? Can those be found in the sub $400 price range? How would the 2435HPL compare to the 2446 or 2447 each with a TruXtnt Be diaphragm? Would the 2446, the 2447 and the 2435HPL all sound roughly the same with each having a Be diaphragm?

Would it be possible to build a 2-way using the above drivers (Be diaphragms on each) with duel side by side 2226's on the bottom, or would it be best to add a mid?

If a person wanted to build such a thing, what would be a good horn to use? Would the JBL-2380 be a decent option? The reason that I am asking about this is because my buddy wants to do a build like this and his pockets are much deeper than mine. LoL!
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post #65 of 66 Old 07-07-2014, 10:22 AM
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Can you purchase an OEM crossover from JBL? If you can buy that you can build your own... Just sayin... That's why I build the 2150's. DIY was WAY cheaper than buying retail. Being able to purchase the crossover was the biggest obstacle. I'll run more accurate tests this weekend Martycool007 but remember, the QSC's are Digital Cinema Speakers and built for that reason only. I'll post the results on a separate thread, this thread is concerning JBL speakers. I only posted my thoughts because the OP was curious about room size and which speakers to use. The JBL are pretty close the my QSC's. and we basically have the same dimensions.
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post #66 of 66 Old 07-08-2014, 07:23 AM
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Originally Posted by rlhaudio View Post
Can you purchase an OEM crossover from JBL? If you can buy that you can build your own... Just sayin... That's why I build the 2150's. DIY was WAY cheaper than buying retail. Being able to purchase the crossover was the biggest obstacle. I'll run more accurate tests this weekend Martycool007 but remember, the QSC's are Digital Cinema Speakers and built for that reason only. I'll post the results on a separate thread, this thread is concerning JBL speakers. I only posted my thoughts because the OP was curious about room size and which speakers to use. The JBL are pretty close the my QSC's. and we basically have the same dimensions.
Do you, or anyone else have any experience or opinions regarding the JBL-2435HPL versus the JBL-2446 and 2447?

My friend, Hank, has found a pair of 2446's for $250 and a pair of 2447's for $300. He wants to start with the best compression and add Be diaphragms. I was not sure which direction to advise him to go, (ie: 2435HPL, or 2446, or 2447). The 2435HPL is the most expensive of the bunch at over $500 each!
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