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post #1951 of 2086 Old 09-13-2018, 10:48 AM - Thread Starter
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@blister64

That's a good call on the cat6 connectors and keystone plates, and the direction I ended up going for the six speakers exposed in the room. (bought 7 of each because I don't trust buying exactly what I need (6) of each when buying cheap Chinese parts.) I'll use some black Fusion plastic spraypaint to paint everything black.

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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric
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post #1952 of 2086 Old 09-13-2018, 10:38 PM
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Quote:
Originally Posted by Archaea View Post
@blister64

That's a good call...
Glad I could help! Those speakers looks awesome with some led lighting!

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post #1953 of 2086 Old 09-19-2018, 05:43 AM - Thread Starter
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Archaea's multi-purpose Home Theater room

Testing out a bass extension module for stereo use and placement in front of the screen. If I like this, then I’ll mount it to the wall instead of on a tripod.







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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

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post #1954 of 2086 Old 09-19-2018, 06:45 AM
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So, do you like it?
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post #1955 of 2086 Old 09-19-2018, 03:03 PM
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Chances are they will sound better for 2 channel music out from the wall like that instead of attached to the wall. However, I know you like DSU for music better than 2 channel anyway - so do I now days.
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post #1956 of 2086 Old 09-20-2018, 07:30 AM
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Chances are they will sound better for 2 channel music out from the wall like that instead of attached to the wall. However, I know you like DSU for music better than 2 channel anyway - so do I now days.
You're a convert now too? Sell out....

Cept I also now use anthem logic music too most of the time.....oops.

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post #1957 of 2086 Old 09-20-2018, 08:42 AM - Thread Starter
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So, do you like it?

Yes I do like it, but not enough to pay much for it, because it's almost entirely unnecessary. (it fills in from 45hz to 65hz, and gives a bit of a boost at the <700hz frequencies -- making a bit of a house curve type FR --- which I can do with my subs or existing speakers through EQ if I want).

I got the first CBT 70ej-1 bass extension module I pictured above for a great price on eBay - new unit in distressed packaging from a local damaged freight place that sells on eBay = $156 + $15 tax.
https://www.ebay.com/itm/JBL-CBT-70J...72.m2749.l2649

I just missed the second one the seller listed last night for $130. My computer betrayed me!
I waited till there was 20 seconds left, as planned out this week - I had three alarms set to make sure I didn't miss it. I sat in front of the computer for the last 10 minutes of the countdown, turned off all my streaming devices, and browsers so that my internet connection would be sure.
I tried to enter my $300 max bid price multiple times as it was counting down the last 20 seconds on the "bid again" eBay page, and my browser somehow kept deleting everything I was typing almost immediately after typing it!!! I'd get $300 typed in, and it'd delete it before I could move the mouse over to the submit. This happened multiple times!?!?! I tried pressing enter, and it still didn't take. I've never had that happen before and can't replicate it now. I started to pull it up on my iphone as a last ditch effort, but it wouldn't load fast enough. Anyway, the 20 seconds ticked down without me being able to enter a higher bid price and the darn thing closed for $116 + $30 shipping.
https://www.ebay.com/itm/JBL-CBT-70J....m43663.l10137

Next closet price on ebay? $500. New price - $590 most places.

I e-mailed the seller (cargolargo) and asked if they had any more and they said no, just the two came in, and they don't control their inventory.

It closed at about midnight. I sat there frustrated for about 2 hours - went to bed at 2AM. Still grumpy about it today.

So yeah, if I can find a used one for $200 range or a new one for $300 range I'd probably buy one - but I don't think I'd pay much more than that, because it's not something I need...I'd prefer to just sell the one I have rather than pay at total of about $600 to fill in 45-65hz on my direct stereo playback - which I'm not sure how much I'd use.

Funny how we all have these arbitrary thresholds of value right? I'll pay up to $300 but not $400-500. Why? Will $200 more, one time, break me? No. So I don't know why -- it's just the way it is.
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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

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post #1958 of 2086 Old 09-20-2018, 07:26 PM
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You're a convert now too? Sell out....

Cept I also now use anthem logic music too most of the time.....oops.


How does that compare to DSU and the old Pro Logic II music?
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post #1959 of 2086 Old 09-20-2018, 07:44 PM - Thread Starter
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Sheldon. You want to not like DSU as much simply unplug your center channel and listen to your stereo music source upmixed to the rest of the speakers sans center. It’s definitely a bit odd. DTS Neural X is worse if the center is unplugged. Plug the center channel back in and both are great again......

Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

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post #1960 of 2086 Old 09-21-2018, 07:28 AM
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Originally Posted by carp View Post


How does that compare to DSU and the old Pro Logic II music?
It doesn't at all. Anthem logic music is by far the absolute best upmixer for two channel music I have personally experienced. I always thought auro did a decent job at it, much better than DSU, but anthem logic is a whole 'nother monster. It is very subtle, but IMO does an excellent job. It does not engage a center channel for the music mode and preserves the stereo image extremely well, with a light sprinkling of ambiance from the surround channels.

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Sheldon. You want to not like DSU as much simply unplug your center channel and listen to your stereo music source upmixed to the rest of the speakers sans center. It’s definitely a bit odd. DTS Neural X is worse if the center is unplugged. Plug the center channel back in and both are great again......
There is a way to change the "Center channel spread" among other settings that may improve DSU's upscaling. Im pretty sure you access it via the "Option" button on the remote but I could be mistaken. I do know it's there somewhere though.

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post #1961 of 2086 Old 09-21-2018, 08:43 PM
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I use the center spread on DSU sometimes, but most of the time I prefer it off.

My setup with my main L and R all the way back agains the wall I don't like how 2 channel sounds. It was a lot better with the speakers out in the room. However... I have to admit I like DSU even more than 2 channel when the speakers were out in the room.

When I went with the mains behind the screen my long term plan was to get some 210 RT's for 2 channel music but I lost motivation since I like what DSU does.

Neural X sounds terrible for music IMO.
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post #1962 of 2086 Old 10-20-2018, 07:45 PM - Thread Starter
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Some of the keen eyed DIY'ers helped me diagnose the JBL 2KHz dip crossover issue. It is Resistor 1, an 8 ohm 20 watt resistor that is apparently bad on most of my crossover boards. It's possible there will be more issues beyond that resistor, but that one is step one to replace because it tested bad on a cab with the dip, and tested good on a cab without. I'm hoping that's the whole of the issue on the speakers with the dip.

Post 52 in this thread.
https://www.avsforum.com/forum/155-d...l#post56990400
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post #1963 of 2086 Old 10-29-2018, 08:57 AM - Thread Starter
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All R1 resistors replaced!


A friend of mine, Josh, and I had a soldering party yesterday and we replaced Resistor 1 on each of the 13 boards without incident. This should resolve the 2Khz dip problem, as it clearly did in the test unit, but I've not re-assembled them yet to test. First, and while the speakers are apart I'm going to modify them to use the LED RGB 5050 lighting.

All crossover boards fixed.



Speaker parts everywhere!
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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric
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post #1964 of 2086 Old 10-29-2018, 09:45 AM
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That's a lotta screws
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post #1965 of 2086 Old 10-29-2018, 11:03 AM
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You'll get them all setup and realize that you miss that 2khz dip.
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post #1966 of 2086 Old 01-09-2019, 05:11 AM - Thread Starter
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Archaea's multi-purpose Home Theater room

I’ve gotten back to work on my LED/JBL project.

It’s taking longer than I ever thought it would.

On average about 4 hours per speaker more for reassembling, fighting to get a working LED strip, running new LED wiring, wiring up the cat6 connection for it, testing everything — and that’s not counting the previous disassembly and crossover work where I had to replace a 8ohm sandbox resistor on every speakers crossover board. I’m having to solder some of the connections to get them to work. Frankly, if I’d known these speakers would be this much of a timesink before starting I wouldn’t have bought them. But I do like their sound and when it’s finished it’ll be fun for years. Carp told me the timesink is why it’s called a hobby.

8 speakers now wired with reliably working LEDs.

Sorry for the mess - it’s temporary.








I wanted front wide left and right in this iteration of my speaker setup, but I’m gonna miss my Mad Max Fury Road sound treatment over my equipment rack, visible in the first post of this thread. I liked the looks of that a lot compared to the speaker now hung there. That’s really the only place for front wides though because of the door and the stair steps.



I’m also not terribly fond of how high I had to place the speaker to dodge my equipment rack and secondary monitor. I may have to move the monitor elsewhere and lower the speaker. I think I’d most like the surround bed channels lower to better build the bubble of sound with Atmos, but I’ll decide that after listening some when I get everything together.

I’m still going to replace all the rear mounts with the JBL mounts which will bring them a little closer to the walls. If I lower all the surrounds — but then there is the concern with one of my little ones punching in the tweeters. 16 ‘fun buttons’ per speaker they could smash - assuming they can reach them. I have a 1 year old and a 3 year old. My two older are 7 and 9 and not a problem. I could put the grills on...
Nah, I like the current look!

The LEDs have full control 0-255 on each color via an app on my phone.

< 5% brightness on red LEDs, 0 on other colors looks neat and is so low lighting I suspect I could run it during a movie with no affect to the screen contrast at all. These pictures are all at 100% brightness on the LEDs by comparison. I’ll probably get a second controller for the three behind the screen for that reason.
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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

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post #1967 of 2086 Old 01-09-2019, 06:22 AM
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post #1968 of 2086 Old 01-09-2019, 10:33 AM - Thread Starter
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They look fantastic!
While you and I may agree, my wife will disagree. ha!

Last night, she asked me why I wanted to 'rice out' my theater?

I said it was inspired by the best commercial theater I've experienced to date.


She just shook her head.

There are those of you who may agree with my wife.

bite your tongue...
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post #1969 of 2086 Old 01-09-2019, 10:48 AM
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Wow that really does look awesome. Very cool effect behind the tweeter pods! That was a great idea.

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post #1970 of 2086 Old 01-09-2019, 01:53 PM
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Im just impressed that your wife knows that term...
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post #1971 of 2086 Old 01-09-2019, 02:45 PM
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Quote:
Originally Posted by Archaea View Post
While you and I may agree, my wife will disagree. ha!

Last night, she asked me why I wanted to 'rice out' my theater?

I said it was inspired by the best commercial theater I've experienced to date.


She just shook her head.

There are those of you who may agree with my wife.

bite your tongue...
So you don't like the Dolby Cinemas or DTS-X theaters in town.

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post #1972 of 2086 Old 01-09-2019, 02:58 PM - Thread Starter
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Archaea's multi-purpose Home Theater room

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Originally Posted by Ladeback View Post
So you don't like the Dolby Cinemas or DTS-X theaters in town.
Didn’t say “didn’t like”.


AMC Prime theaters were the first iteration of what is now Dolby Cinema at our local AMC theaters.

Subjectively speaking, the AMC Prime using the JBL speakers had better sound than the Dolby Cinema using whatever they “upgraded” to. I was a bit disappointed when they moved away from the JBL line arrays — the first few times I visited.

I remember our KC group watching the Hobbit together and all commenting how great the JBL line arrays sounded on those ending credit vocal music. I agreed fully.

AMC Prime was the first place I experienced Atmos with the movie Brave - also with the KC enthusiast gang. That’s why I have a Brave poster mounted in my room and often use it as a demo clip. Atmos was a milestone in audio — and it was spectacular there. There was a Dolby rep on site for our show to explain Atmos before the movie — so that was unique too. Any-rate it generated a soft spot for me for that theater, look, and speakers.

Not sure I’ve been to the DTS-X theater yet. Which one is that?
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(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

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post #1973 of 2086 Old 01-09-2019, 06:59 PM
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Originally Posted by Archaea View Post
Didn’t say “didn’t like”.


AMC Prime theaters were the first iteration of what is now Dolby Cinema at our local AMC theaters.

Subjectively speaking, the AMC Prime using the JBL speakers had better sound than the Dolby Cinema using whatever they “upgraded” to. I was a bit disappointed when they moved away from the JBL line arrays — the first few times I visited.

I remember our KC group watching the Hobbit together and all commenting how great the JBL line arrays sounded on those ending credit vocal music. I agreed fully.

AMC Prime was the first place I experienced Atmos with the movie Brave - also with the KC enthusiast gang. That’s why I have a Brave poster mounted in my room and often use it as a demo clip. Atmos was a milestone in audio — and it was spectacular there. There was a Dolby rep on site for our show to explain Atmos before the movie — so that was unique too. Any-rate it generated a soft spot for me for that theater, look, and speakers.

Not sure I’ve been to the DTS-X theater yet. Which one is that?
B&B Theaters in the area use DTS-X. We have a new one here in Liberty. There is one in Shawnee and I believe Lee Summit. I like it, but my ears are old and a little damaged so you would need try it out to see if you like it. We go to the B&B more , because its closer the. AMC.

I do remember the old Prime and was impressed the first time I went to see a movie in it. They do look cool set up, and it would be cool to hear them
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post #1974 of 2086 Old 01-10-2019, 08:47 AM
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The Shawnee B&B is really close to me. The chairs are better than any of the AMC theaters because they recline all the way down (well, not quite all the way but much more than AMC theaters) and the Grand Screen theater has the biggest screen I've ever seen in a theater. The sound - while good - is not as good as the AMC theaters with Atmos and I agree with Jonathan that the JBL speakers they used to have in the Prime theaters were better than what they have now.

I love the look of the lights behind the speakers and would do it if I had those speakers. I like long projects in the summer when I am unemployed.
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post #1975 of 2086 Old 01-10-2019, 08:49 AM
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A big part of the issue with the sound in the grand screen theater is that the theater is so massive that there is no way they will have enough subs.
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post #1976 of 2086 Old 01-10-2019, 10:27 AM
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Quote:
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A big part of the issue with the sound in the grand screen theater is that the theater is so massive that there is no way they will have enough subs.
AMC is just behind the times. Here in KC we know that the subwoofer to listener ratio should be 3-8:1 and flat house curves are for vinyl loving audiophiles.
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post #1977 of 2086 Old 01-10-2019, 10:56 AM
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AMC is just behind the times. Here in KC we know that the subwoofer to listener ratio should be 3-8:1 and flat house curves are for vinyl loving audiophiles.
Exactly. In the B&B theaters they have enough room to put a nearfield sub behind every seat and they need to get on that.

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post #1978 of 2086 Old 01-11-2019, 06:54 AM
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I have been in both Grand Screens in the B&B Liberty area. The 170 degree X screen was pretty cool when watching Aquaman. Yes it could use more bass in both theaters, but not everyone loves tons of bass. I have had some friends complain the the AMC Dolby Cinema was to load and tom much bass. The difference AMC has is there are butt kickers in the sites, B&B doesn't seem to have any so Nearfields would be a good addition, but doubt they would spend the money on it. I have also been in the MX4D theater and it is more like a ride. Didn't like it. The chairs don't recline and you are stuck in one position for the whole movie. Also the picture quality did seem as good as the Grand Screens and it was a smaller screen. Seen Fantastic Beast 2 in it, because my wife wanted to see it. She is epileptic and I was worried the lightening strobes were going to cause her to have a seizure, but didn't. I was sore all over after that movie experience. My size may have something to do with that as well.

Now I do know that the AMC Barrywoods theater still has a Prime theater, but I haven't been in there to see what it is like. I don't know if they have the JBL speakers Jonathan has or not, probably something else. I may have to check it out and see.

We all know a commercial theater is going to be hard to beat then most of your guys theaters. If mine was complete and as nice as yours I probably wouldn't go to the movies much at all except when the wife wanted to.

So when do we get to experience the new speakers Jonathan?

Klipsch KPS-400’s FR/FL with built in 15” 300 watt side firing subs, RC-7 Center, RS-3 Surrounds.
Integra DHC-60.5, 5- Marantz MA700 Mono Blocks, Pioneer DV-F727 301 Disk DVD CD Changer, Pioneer DVL-909 Laserdisc/DVD/CD Player, Sony PS3.
https://www.avsforum.com/forum/19-ded...ck-cinema.html
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post #1979 of 2086 Old 01-17-2019, 10:14 PM - Thread Starter
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Thanks to the DIY crew, I now have 13 fully functioning JBL CBT 70j-1 speakers!

I started with this: (9 speakers with a dip at 2khz, and 1 speaker completely roasted)

And now, final post from the other thread! The best FR captures look better in the first post, because of my speaker placement and mic placement for the original tests - that doesn't matter that hasn't changed - what I was shooting for was 13 nearly identical FR captures, and besides some fairly typical randomness above 15Khz with the current captures - I'm there! whew...

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Originally Posted by Archaea View Post
Just finished.

Measured and...BAM



I AM ALL THAT IS MAN!



It worked and I feel like a million bucks. I now have 13 fully functional JBL CBT 70j-1



THANKS FOR YOUR HELP GUYS!
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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

Last edited by Archaea; 01-18-2019 at 03:25 PM.
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post #1980 of 2086 Old 01-22-2019, 09:14 PM - Thread Starter
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Archaea's multi-purpose Home Theater room

I picked the three I thought had the closest FR overlays to use for L/C/R.













Last night and tonight my wife and I are patching holes and fixing drywall so we can use the new JBL mounts. Might need one more night for re-application and maybe a couple more nights for painting.

I’m swapping out my secondary 27” monitor that went over the rack for a 22” so I can lower the front wides about five inches. I didn’t like the sound field as high as I originally had it placed. Might still not like it but going to try it for a while before I move the monitor completely somewhere else. It’s just my monitor I use when listening to music and not wanting to burn my projector bulb so size didn’t matter. I was considering buying a 13” 1080p to replace it, but they are both pricey and only off brands since they are an atypical size.



Swapping this type of homemade mount for the JBL mounts that came with my speakers.









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Archaea's 9.8.4 Home Theater Room
(13) JBL CBT 70j-1 | Denon x7200wa | Sherbourn PA 7-350 amplifier | (8) Ultimax 18" sealed subwoofers | (4) iNuke DSP 6000 amplifiers | (4) MB Quart 12" subwoofers mounted direct mounted to Berkline theater chairs BOSS style | Epson 5040UB Projector | Jamestown 144" acoustic transparent 2.35:1 screen w/ Seymour XD fabric

Last edited by Archaea; 01-22-2019 at 09:33 PM.
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