OMG these JBL 4722's are HUGE. How should they be wired? - AVS | Home Theater Discussions And Reviews
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post #1 of 20 Old 09-08-2014, 06:53 PM - Thread Starter
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OMG these JBL 4722's are HUGE. How should they be wired?

First off, I bought these based on a few people's opinion on this site and let me say they are HUGE and very impressive in person. It's hard to explain how big they are until you stand next to one. I'm digging the look of them and feel good so far about making the purchase, but still a long way to go until I get them all working together. I'll wait until they are all wired up and running before deciding if they were worth the money.

Before I fire them off I wanted to double check the way I have it wired up. On the top it says to wire the "red & black to JBL 4739 Low Frequency Enclosure". I ran the red and black to the lower enclosure and plugged them in with the wires from the amp. So what is the little green "+ / -" on the box that is part of the horn?





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Last edited by C O D Y; 09-08-2014 at 06:56 PM.
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post #2 of 20 Old 09-08-2014, 07:29 PM
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I believe you connect your amp to the green +/- on your horn. Otherwise your horn isn't getting any power. Basically what your connecting the amp to is the x-over for your speaker.
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post #3 of 20 Old 09-08-2014, 07:36 PM
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Ooh nice speakers. Dig em. Looks like your speakers are biampable.
You would need pair for the lows, and pair for the highs. Should sound fantastic. Thats if you have a biampable amp lol.

Try Marantz pm6005 or 8005 or a bridged mode amp.

Last edited by NAIM101; 09-08-2014 at 07:40 PM.
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post #4 of 20 Old 09-08-2014, 07:49 PM - Thread Starter
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I ordered the 4722N because the specs say "Available for Bi-amplified operation on (model 4722) or fully passive operation (model 4722N)". I can see that these are the 4722N's, but still not sure what the green +/- on the HF horn is?

I did fire one up with the wires (red / black) going right down to the bottom enclosure and HOLY EAR RINGING BATMAN! These sounds just like they look.... my ears are still ringing from leaning on the gain nob to fast. I only took them up to about half and my ears gave up.

Still curious what the heck is the little green "+ / -" on the box that is part of the horn?
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post #5 of 20 Old 09-08-2014, 09:54 PM
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Who knows. Maybe the 4722's give you a piece to connect to the horns so you can bi-amp them?
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post #6 of 20 Old 09-09-2014, 12:32 AM
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Maybe you should ask @notnyt . He has a pair of these monsters.
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post #7 of 20 Old 09-09-2014, 12:34 AM
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Lol.

The box under the waveguide is the crossover network. You run the output from your amp to there. Then there are two outputs from there, one to the waveguide, one to the enclosure.

You have your amp hooked up to the enclosure, disconnect that, and run it to the phoenix connector on the crossover.
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post #8 of 20 Old 09-09-2014, 08:49 AM - Thread Starter
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BINGO! That was it.

Something didn't sound right. It was loud, but the sound wasn't right. Made the change and wired the amp to the green connector and the red / black wires to the lower enclosure and WOW! Now it's loud and the sound is PERFECT!

YOU THE MAN notnyt!


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Lol.

The box under the waveguide is the crossover network. You run the output from your amp to there. Then there are two outputs from there, one to the waveguide, one to the enclosure.

You have your amp hooked up to the enclosure, disconnect that, and run it to the phoenix connector on the crossover.
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post #9 of 20 Old 11-11-2014, 01:21 AM
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Any updates on these? I've always been interested in getting a pair or 3 to try out.
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post #10 of 20 Old 11-11-2014, 08:23 AM - Thread Starter
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I will have an update shortly. Just finishing up everything and will have it all hooked up in a few weeks. I'm super excited!

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Any updates on these? I've always been interested in getting a pair or 3 to try out.
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post #11 of 20 Old 12-13-2014, 01:07 PM
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Quote:
Originally Posted by C O D Y View Post
I will have an update shortly. Just finishing up everything and will have it all hooked up in a few weeks. I'm super excited!
I would love to read an update as well. I'm also curious which speakers you are going to use with these for your Atmos effects. I noticed another thread of yours and I also need xlr for my sub as a minimum.
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post #12 of 20 Old 12-13-2014, 02:42 PM
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Bada** Cody - looking forward to your impressions!
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post #13 of 20 Old 12-13-2014, 03:54 PM - Thread Starter
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Sorry for the delayed update. I've been wanting to get them turned on before responding again, but things have been busy and I want to make sure it has my full attention when I fire them up. I have not turned the system on yet, but it's all wired up and ready. Since I'm doing this all myself it took me a long time to finish trimming out the room. Right now I'm test fitting the 12" subs that go behind each seat and then finish up the bar so I can install the carpet. Here's some photos of where I'm at now (my wife is standing next to the speakers for perspective).

In the ceiling I used 4 Definitive Technology UIW RCS II (http://www.definitivetech.com/products/uiw-rcs-ii)

I should be able to turn the system on sometime next week.







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Last edited by C O D Y; 12-13-2014 at 03:57 PM.
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post #14 of 20 Old 12-13-2014, 04:26 PM
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Do you have a thread on the room build? If not, you should!!
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post #15 of 20 Old 12-13-2014, 06:01 PM
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Great looking room!!!!
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post #16 of 20 Old 12-13-2014, 06:45 PM
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Bravo! Especially if you're doing it yourself!

FS: Three JTR 212HT's (ported version). http://www.avsforum.com/forum/209-au...r-212ht-s.html
FS: JTR S2. Sold
FS: NHT ClassicTwo LCR http://www.avsforum.com/forum/209-au...-twoc-lcr.html
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post #17 of 20 Old Today, 12:26 AM
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So where is the update?

FS: Three JTR 212HT's (ported version). http://www.avsforum.com/forum/209-au...r-212ht-s.html
FS: JTR S2. Sold
FS: NHT ClassicTwo LCR http://www.avsforum.com/forum/209-au...-twoc-lcr.html
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post #18 of 20 Old Today, 08:38 AM - Thread Starter
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The 4722's are fantastic! They are unbelievably over the top and sound fantastic. I've only been able to turn the system up to about 35%. At that volume it feels like you're in an earthquake and the I don't want to break the window. Here's some photos of the theater room done (the last 2 photos show my garage and the theater is sitting suspended on that 3' tall glue-lam).



















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Originally Posted by uopdrmark View Post
So where is the update?
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Last edited by C O D Y; Today at 08:42 AM.
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post #19 of 20 Old Today, 02:15 PM
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I think u did great job with the design !

I also want to build my HT using JBL pro.
but with the smaller version - 3722N
as understand from your Thread - the N version is the version where i can just plug + and -
directly from the amp without need of Bi Amp or external crossover right?
Second Q- can i drive them with AVR ? in my case Yahama 3030

Thanks a lot!

Last edited by Avico78; Today at 02:22 PM.
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post #20 of 20 Old Today, 07:37 PM
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Great looking theater! Really well done. I wish I was closer so I could check it out!

FS: Three JTR 212HT's (ported version). http://www.avsforum.com/forum/209-au...r-212ht-s.html
FS: JTR S2. Sold
FS: NHT ClassicTwo LCR http://www.avsforum.com/forum/209-au...-twoc-lcr.html
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