What one is better for surround speaker, Def Tech UIW RCS II or JBL 8320? - AVS Forum
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post #1 of 16 Old 08-15-2014, 10:15 PM - Thread Starter
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What one is better for surround speaker, Def Tech UIW RCS II or JBL 8320?

I want to use JBL 8320's in my dedicated theater, but not sure they will fit with the stairs and head height. I can get Def Tech UIW RCS II's for 50% off directly from the factory and put them in the wall at ear level, but not sure they will be as good as the JBL 8320's for surrounds.

If space is not an issues, would it be better to use JBL 8320's or Def Tech UIW RCS II for surround sound? The JBL 8320's look to be about $250 (retail $370) and the Def Tech UIW RCS II are $325 (retail $650).

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post #2 of 16 Old 08-16-2014, 02:32 PM
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What front LCR are you using?

The 8320 is horn loaded but does not use a compression driver so it isn't as efficient as the 8340 etc. It's a fine high output surround.

They Deftech is excellent as well. Why are you looking at the RCS instead of the RSS of RLS?
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post #3 of 16 Old 08-16-2014, 03:18 PM - Thread Starter
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The RLS's look good too. I could get them for 50% off too so I guess they are an option. I wanted to keep the side surrounds at ear level and flush mounted. The ceiling speakers will be the Def Tech RSS's and the LCR's will be JBL's three 3677's and two 3635 subs as they all fit behind the 20" deep screen area.

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What front LCR are you using?

The 8320 is horn loaded but does not use a compression driver so it isn't as efficient as the 8340 etc. It's a fine high output surround.

They Deftech is excellent as well. Why are you looking at the RCS instead of the RSS of RLS?
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post #4 of 16 Old 08-16-2014, 04:53 PM
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Since you are using 3677s up front, get the JBL surrounds and don't worry about the Deftechs. In fact, I would step up to the 8340s so you have compression drivers in all your speakers - you can get them for significantly off retail if you call around - won't be much more than your 8320 price.

I strongly urge you to reconsider that jbl sub. It is down -10db at 28hz; that is terrible performance for a subwoofer.
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post #5 of 16 Old 08-17-2014, 08:23 PM - Thread Starter
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You are right. A little research turned up lots of better subs. Thank you for asking me to reconsider the JBL sub. The only reason I was going with the JBL 3635 subs was the depth fit easily behind my 18" cavity behind the AT screen.

I think I can fit a Seaton SubMersive F2 behind the screen. Do you think that be a good sub to match with three JBL 3677's up front and 8340's for the surrounds?


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Since you are using 3677s up front, get the JBL surrounds and don't worry about the Deftechs. In fact, I would step up to the 8340s so you have compression drivers in all your speakers - you can get them for significantly off retail if you call around - won't be much more than your 8320 price.

I strongly urge you to reconsider that jbl sub. It is down -10db at 28hz; that is terrible performance for a subwoofer.
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post #6 of 16 Old 08-17-2014, 08:41 PM
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I'm building a new house w/ theater now, and will be using 8340 surrounds with 3252N front + a seaton F2. Based on many conversations I've had, this will all match perfectly. You won't be disappointed.
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post #7 of 16 Old 08-18-2014, 12:08 AM
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If your sub is behind the screen, you could do 4 Stonehenge subs from diysoundgroup.com for less than 2g. Are you doing atmos?
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post #8 of 16 Old 08-18-2014, 07:16 AM
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How big is your room?

I think the F2 is a fine choice for all but the largest rooms, and even then, you can add a second one using the slave unit option.
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post #9 of 16 Old 08-18-2014, 08:11 AM - Thread Starter
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The room is 17' x 30' x 10'. The thought of a DIY Sub interests me for the savings and the Stonehenge looks like a great fit, but what sub and crossover would I want to use? Looking at the DIY subs that others have done it doesn't look to hard.

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How big is your room?

I think the F2 is a fine choice for all but the largest rooms, and even then, you can add a second one using the slave unit option.
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post #10 of 16 Old 08-18-2014, 09:08 AM
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DIY is the way to go if you are mechanically inclined. There are several great 18" driver choices from Stereo Integrity, Dayton etc. I am sure the DIY board can give you some recommendations.

You won't need a crossover - the bass management in your receiver will take care of it. You will need an amp though, which they will also be able to recommend.
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post #11 of 16 Old 08-18-2014, 02:17 PM
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I also add to going with JBL 8340's I don't have them but they would be the only speaker I would upgrade to. Currently running 8330A's and B212XL's up front. Great choice with the 3677 again what I would upgrade to if I needed it.
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post #12 of 16 Old 08-18-2014, 03:06 PM - Thread Starter
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You guys have been a HUGE help. I don't know what or where I would be without this site. My wife wishes I never found this site! lol But she'll love the room once it's done.

Going to go with all your guys advice and get the 8340's for sure. Still leaning toward using the Def Tech's for the flush mounted Atmos ceiling speakers. As for the Subs, datranz has got me doing a bunch of research on the Stonehenge sub box. Dave listed some good places to buy the drivers. So this is what I'm thinking the set up will look like:

LCR = 3 JBL 3766's (or might go with 3731's since I saved so much $ on the subs)
Surrounds = 4 JBL 8340's
Ceiling Atmos = 4 Definitive Technology UIW RCS II's
Subs = 2 DIY 18" Stonehenge's


Was thinking about getting Crown X4000 to power the subs. The sales price of $300 seems like a great value!




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I also add to going with JBL 8340's I don't have them but they would be the only speaker I would upgrade to. Currently running 8330A's and B212XL's up front. Great choice with the 3677 again what I would upgrade to if I needed it.
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post #13 of 16 Old 09-17-2014, 10:00 AM
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Any tips on where to get the UIW RCS II's for that price?
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post #14 of 16 Old 09-17-2014, 10:38 AM - Thread Starter
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I have a friend that bought them brand new. He changed his design for his home system before he opened them so he let me buy the 4 extra ones he had. So the price I was looking at was a one time deal. Sorry I can't be more help.

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Any tips on where to get the UIW RCS II's for that price?
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post #15 of 16 Old 09-17-2014, 11:04 AM
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You can buy factory refurbs with warranty for that price or under from ebay seller bajawaverunner, which is the definitive technology factory store.
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post #16 of 16 Old 09-17-2014, 07:19 PM
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I've looked at baja but he gets them so rarely they usually sell right away. I asked him to hold some for me and he said he cant
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