JBL Pro 3677 Have arrived!!! - Page 2

No it's not discontinued...JBL finished building mine last week and Full compass still sells them currently. If you saw that at Performance Audio (I think that's the place) I don't know why there site says disontinued, it's said that a few months ago before I ordered mine....it's definately not true.

Not only that I had to get on a waiting list to get mine. It took over a month to get them as the batch they had in August was sold out and when I did get on it the list was almost full..meaning I would have had to wait even longer.

I probably won't take pics until the speakers are installed into the corner columns and then I have to build a new enclosure for the center and mount it into my wall behind the screen. It'll take me a little while to get it all done.

Below is a link to an old thread of mine....page 3 or 4 has pics of my room..for now I have a 3677 in each corner sitting on some really strong plastic boxes to pic them up some..the center is tilted up but blocking a little of the screen.

http://www.avsforum.com/avs-vb/showthread.php?t=1193594

They dynamics are unbelievable. Origainally I planned on buying the parts and building these, but it was cheaper to buy the whole speaker. So I went in knowing I was going to gut these and build three new enclosures and knowing I could play around with horns and drivers if I needed too...all without touching the Xover as it just so happens the sensitivity of all the drivers I may use are within .5db.

I've actually contacted Wayne at pi speakers because these are very similar to the popular 4pi speakers which use the JBL 2226 and a B&C CD. I'm hearing very slight harshness, it's hard to hear and not all content exposes it... Wayne says it's the horn. He said the 2416h-1 CD is very smooth but he's used the horn I have before and found it to be "spitty" and a little harsh.

Which is really cool...even if I swap out horns...I'll just sell the JBL horns. And if I want more top end the B&C DE250 CD is what Wayne likes...he said he used to use the JBL 2426 (popluar in some of the JBL cinema screen arrays) but he finds the B&C is cheaper, just as smooth with a better top end.

If I go the B&C route I may make some $$$ as the JBL is a very pricey driver even in the used market.

So anyway...they sound great as is but I want to tweak a little. As for vocals and the woofer....it's perfectly awesome.

We had a b-day party this weekend for my 10year old daughter. I opened the sun room doors which is attatched to the theater room and let'em crank as we spent the day outside...they sounded great...like I'd hired a DJ.

So anyway, I may end up with a JBL/4 pi hybrid.

Absolutely. I'm tired of trying consumer...for an all out HT they just don't cut it. The dynamics I now have are a huge step above consumer. I went in knowing I could swap the top end around if I wanted to...and having a DIY background I enjoy it.

Why would I buy these again...well If I wanted an all in one Kit I would have bought the 4pi from Wayne at Pi speakers, it uses the same JBL 15 used in theaters... but I would have spent about $700 each and still would have to build cabinets... but that really is a good deal.

Buying the 3677 was $569 each..complete speaker. I have the $350 JBL 15" woofer the $250 tweeter, a pricey horn and a good xover. I was hoping to not have to do anything of course. But the JBL parts are so sought after if I change a horn or even a CD I can sell the JBL parts on Ebay pay off what I replaced them with and maybe even make some extra.

I've ordered two different horns from Parts Express to try out (one of them is used on the 4pi). I'll see how it goes.

I'm kinda new to the Pro stuff, only been trying them out for about a year, I've only tried JBL 8340a, Pro10 and the JBL3677.

These are the bang for your buck speaker in JBL cinema Pro line...in this price range I doubt you'll find this quality. From here expect to pay close or over 1k each (new) for JBLs next up the line cinema stuff. They primarily use the same woofer I have or the 2226. The biggest differences are the horns which get larger and larger and also a about 2k you can also get into 3-ways.

For rooms like we have I didn't see any point in going insanely huge. The bigger ones also have dual 15s but that only gives you 2dbs of gain (unless you bi amp) which is irrelevant to me because I'm not even close to the limits of having one 15 which is giving my a 99db sensitive speaker.

Also I've owned the Pro-10 and it's a super musical speaker..had it had a good 12" or 15" driver and had a little better slam it would have been even better. It has a small horn but imaged like crazy...the only thing I found wrong with horn and CD was it kinda got fatiguing and broke up with lots of action during movies. Now after talking with some speaker designers who've tryed the Pro10s CD driver I know why...on paper it's top end breaks up and distorts a little. Other than that the very small horn sounded HUGE.

Yea..I hear ya..I want to finally be DONE with my theater room. Mine is 18 deep 14 wide 8.5 high. I built my house about 3.5 years ago and the dedicated HT was a must. YOur room is HUGE. You definately need some really effecient speakers to fill it.

If swapping out the horn does what I think it will these will be a home run. Check out this site
http://www.pispeakers.com/contents.html

They are well known in the DIY realm as they sell kits. The most popular speaker is the 4pi...15" JBL with a CD this is very respected high end speaker. I ordered the same horn it uses to test on my CD. The 3677 is very similar to this speaker.

FWIW I also own a Paradigm Focus setup and also Rocket RS850s running in my living room...I'm very familiar with what you find lacking...the JBLs dynamics are in another Universe. I'm running a 60hz Xover because the are so damn impressive that low...I'd love to go to 40hz but my surrounds wouldn't like it..I can't individually set xovers for each speaker on my AVR.

Keep in mind I don't listen at reference levels...close but not quite. I usually set it to where it feels natural to me. I will warn you..these are not for people with heart conditions...gunshots, door knocks...or the parts in scarry movies that are meant to startle you will scare the crap out of you...scenes like these are where the dynamics really amaze.

I may have said that. At first I didn't know what was causing it. Wayne, the owner of Pi speakers said it's the horn. I find the Klipsch RF series to be very fatiguing (owned the RF82s for a few weeks) as does my wife. We don't like fatiguing either.

As for the 3622n MK theater was the first I know of to go with these....he said they were a step above the JTR t8. I almost bought 3 4622n's in August, but they were used and shipping was $600. They were only 2db more sensitive (had two 15"s) the big difference in our rooms will be the horn which allows it to crossover at around 800hz I think. Although the 3622 (also huge horn) crossed over at 1.3k....not sure why.

The 4648 is the low freq. section used in the 4622.. it has 2 15" 2035hpl drivers...the same driver in the 3677. It's pretty much the bottom half of the 4622 I almost bought...Wager just bought 3 of them.

What are using for the horn assembly?

From what I understand by speaking with Wayne at Pi Audio..the JBL CD in these speakers are all good quality very smooth drivers. If it sounds harsh it'll probably be the horn you'll want to swap out first... as he's positive that's what's causing it in my case. He used to use JBL 2426 as his "high end" option in his speakers...he said it's almost identical to the 2416 I have.

Because of this I don't know if I'd go for the 3622, I don't think you'd gain a whole lot if any from the extra 15" driver (2dbs sens.)..and if you're gonna change the horn I don't see any reason to spend the extra $$. Of course the 3622 is discontinued..the newer screen arrays crossover around 750-800hz so that actually could be a plus.

Cool... you're basically building a 4670 with a slightly different CD. That should be a great setup.

I need to get that movie!

This is what's current in the 2-way screen array.
http://www.jblpro.com/catalog/genera...x?FId=30&MID=1

As far as what to use...if you're buying new I wouldn't put my money into those because they are more than you'll use. The 3677 has 1 woofer and I'm barely giving it a workout....having two would only give me a 2db increase and I wouldn't notice any difference...the 3677 is good for up to 200 seats.

Also Wrager just bought 4622n's and he's not quite satisfied with the horn....but the good thing is these are easy to experiment with and swap.

The only real benifit I see is the lower Xover point in the 4622 and current screen arrays. The crossover is at ~750hz...vocals average 1k, so the plus is the horn carries more of the vocals. However if the crossover is well made and the horn is nice and smooth a higher crossover like the 3677 has at 1.2k shouldn't be noticable.

I really can't tell you what to get...I'm not sure exactly what I'll end up with as far as the horn goes. If you wanted a fool proof aproach you could buy a 4pi kit...the CD is the same one Geddes uses and what I'll try if I change the CD (B&C DE250).