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Official JTR speaker thread - Page 10

post #271 of 8265
9/18/09 at 7:58am
I read on the JTR forum that once the new driver for the Growler is ready he is going to use it in the Captivator as well.
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post #272 of 8265
9/18/09 at 7:27pm
Not trying to change the subject,has anyone ran Audyssey eq with triple 12s and it says fullrange instead of 60,70,or 80 hz? thanks
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post #273 of 8265
9/18/09 at 8:11pm
Quote:
Originally Posted by biffbyun View Post

Dave, thanks for the advise. Yeah I'm not looking forward to sending if back if needed. Do you have the 2010 version? I'm guessing yours does not exhibit this behavior. What's weird is that I had the PSB Platinum, X-voce, and Rocket RSC200, before the triple 8's and never had this particular issue.

Given that you had multiple other centers in this same position without the artifact as described.... it seems likely that you have a problem with the unit. I did get a faulty T8 (so it does happen). Sent back to Jeff. Diagnosis pending.

Allan
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post #274 of 8265
9/19/09 at 7:09am
Quote:
Originally Posted by dholmes54 View Post

Not trying to change the subject,has anyone ran Audyssey eq with triple 12s and it says fullrange instead of 60,70,or 80 hz? thanks

Yes, Audyssey has set the T12LF's as full range on every EQ attempt (I have done many). The results vary from a little to a lot on each Audyssey EQ sequence. Since you can't really see what Audyssey is doing, the results are a mystery. They (Audyssey) have a just trust us, we are smarter than you attitude ...
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post #275 of 8265
9/19/09 at 7:22am
There is absolutely no reason to be a slave to the crossover settings determined by Audyssey. Set them at points that seem logical to you or feel free to experiment with different crossover points. Audyssey still works fine after you change the suggested crossover points.
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post #276 of 8265
9/19/09 at 9:01am
Quote:
Originally Posted by mojomike View Post

There is absolutely no reason to be a slave to the crossover settings determined by Audyssey. Set them at points that seem logical to you or feel free to experiment with different crossover points. Audyssey still works fine after you change the suggested crossover points.

Of course you are right Mike, thanks for answering the question. I got side tracked by my little Audyssey rant and forgot to make the cogent point.
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post #277 of 8265
9/19/09 at 9:22am
thanks,I did go to the menu & changed the x over to 50hz like Jeff stated.I watched the Dark Knight blu-ray with my new12s,it was Great!!! the only problem is one of the drivers is making a crackling sound with very little output,that sux!
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post #278 of 8265
9/19/09 at 4:14pm
Quote:
Originally Posted by mojomike View Post

There is absolutely no reason to be a slave to the crossover settings determined by Audyssey. Set them at points that seem logical to you or feel free to experiment with different crossover points. Audyssey still works fine after you change the suggested crossover points.

Not that it is really a big deal, but although Audyssey does continue to work if you raise the crossover point, if you lower the crossover point, Audyssey disables the EQ for that speaker to prevent speaker damage.

For example if you have a room null around 120 hz that Audyssey mistakenly chooses as the crossover point for a speaker that extends to 80 hz and you lower the crossover point to 80 hz, the EQ is disabled to prevent Audyssey boosting low frequency output for that channel to compensate for the new crossover point.
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post #279 of 8265
9/20/09 at 9:27am
I had to remove a bad driver from one of my 12s,the cabinet is well made,no wonder there so heavy!!! the drivers are made in Ky,at least we do something besides whiskey!!!
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post #280 of 8265
9/20/09 at 9:50am
Installed the Slanted 8's yesterday, ran an Audyssey setup. Audyssey had the T12LF's as full range, gave the T8's a 90hz and the S8's 80hz Xover . I reset these to my preferences (LCR 60Hz, T8's 80hz and S8's 100hz), did some tweaking of the levels and all seems fine.

You guys are making me think I may have a loose wire in the T8s and will investigate later today. Anyone know which driver to pull to provide best access to the crossover? I'm thinking the coax...

Couple of pics of the mounted S8's and the T12's

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post #281 of 8265
9/20/09 at 10:41am
Quote:
Originally Posted by RMK! View Post

Installed the Slanted 8's yesterday, ran an Audyssey setup. Audyssey had the T12LF's as full range, gave the T8's a 90hz and the S8's 80hz Xover . I reset these to my preferences (LCR 60Hz, T8's 80hz and S8's 100hz), did some tweaking of the levels and all seems fine.

Your T8s and S8s are in entirely different positions in the room, and the T8s are designed to handle much higher levels than the S8s. You could have very easily seen the same difference in crossover recommendation if the speakers were identical. This alone makes no suggestion of any problem with the speakers. I have seen systems like Audyssey suggest a crossover of 50Hz on one Catalyst and 100Hz on another from a single set of LCR speakers. This is related to the room's interaction and what frequency ranges are efficiently transferred to the seats. Measurements at the listening position of the 3 speakers noted above clearly explain where the recommended crossover point came from (ie a hole in the 60-90Hz range).
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post #282 of 8265
9/20/09 at 11:08am
Audussey set my surround back speakers to 150 hz. When I had the same speakers up front it set them to 60 hz. Although Audyssey is more optomistic about front speakers, my problem probably has to do with the fact that the back of my couch partially blocks the speakers. I can't imagine that this could be the issue in your room.

I probably need to move my surround back
speakers up.
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post #283 of 8265
9/20/09 at 11:41am
Quote:
Originally Posted by Mark Seaton View Post

Your T8s and S8s are in entirely different positions in the room, and the T8s are designed to handle much higher levels than the S8s. You could have very easily seen the same difference in crossover recommendation if the speakers were identical. This alone makes no suggestion of any problem with the speakers. I have seen systems like Audyssey suggest a crossover of 50Hz on one Catalyst and 100Hz on another from a single set of LCR speakers. This is related to the room's interaction and what frequency ranges are efficiently transferred to the seats. Measurements at the listening position of the 3 speakers noted above clearly explain where the recommended crossover point came from (ie a hole in the 60-90Hz range).

Thanks for the input Mark, I used a slightly larger rectangle for the Audyssey measurement (8 positions) than I have in the past. I just used the Rives Test Tone CD and was +/- 4db 20 -100hz at the LP. The largest drop was approx 4db @80hz. That measurement was at the LP only, but it doesn’t seem like much of a “hole”.

There are so many variables involved here that I’m not confident there are or aren’t issues with the response. Looking forward to your in-person take on things.

BTW, checked the drivers on the T8’s and they are fine.
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post #284 of 8265
9/20/09 at 4:20pm
Hey Jeff, got any pics of the Quintuple yet ?
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post #285 of 8265
9/20/09 at 4:32pm
Quote:
Originally Posted by RXPorlando View Post

Do you guys think there would be a benifit in doing away with the cheap crimp on connectors and soilder the wires directly to the cross over?

I no these connectors up the resistence in the wire and can also come loose causeing additional problems if it falls off and grounds out on a speaker so it seems like a good idea for a solid connection that can't come loose. Is there any draw backs to doing this that you can think of?

I'm also wondering about the thick stranded high resistence 12volt car wire used in these speakers. I think this could be a nice inprovement useing a thin stranded quality copper speaker wire of the same gauge with a much lower resistence. The thinner the strands and as a result more of them results in lower resistence and a better flow of electrons.

I realize everything has to do with cost and these crimp on connectors are used soley to speed up the build time per speaker and not done because it's the better way to connect wires in a high vibration senerio. Cheaper wire is well cheaper then quality wire. I realize these things are done to keep the price of the build as low as possible and keeps the price of the speakers with in reason while still makeing a profit.

I really love my triple 12LF and just want them to be the best they can be. I think With a few upgrades they can be even better and more reliable.

I'm going to rew one speaker with the upgrades and compair it with the one with out the upgrades and see if there is any noticble inprovements in sound quality. I'm thinking with the inprovements I should get better mids and more detail highs? I should have results in two weeks so stay tuned. I'm waiting on sound card and calbrated mic to conduct this test.

As much as the wire connection type may matter - this is really getting to the point of minimal/non-perceptible gain. The electrons are still moving through the wire the same way. If you make changes to the crossover as a whole you'll see benefit (higher quality components) but I doubt soldering rather than crimping will truly affect SQ.
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post #286 of 8265
9/20/09 at 4:53pm
It seems the soon to be Quintuple 8 has the same freq. response as the Triple 12. Are they going to sound the same?
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post #287 of 8265
9/20/09 at 6:12pm
Jeff, if you're out there, I haven't heard from you. I've replied to your pm twice. Can you let me know how to proceed?
Thanks,
Rob
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post #288 of 8265
9/20/09 at 6:54pm
I removed the driver that is not playing correctly & connected it to my amp & it sounded ok didnt make any odd sounds like it did when it was in the cabinet,wonder whats wrong? If it was the x-over looks like all the woofers would be affected.thanks
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post #289 of 8265
9/20/09 at 9:50pm
Wow guys, some really nice setups here!

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post #290 of 8265
9/21/09 at 3:08am
Quote:
Originally Posted by bodhisafa View Post

Does anyone have a captivator, if so, do share impressions and pics if possible

Would like one for my HT but it seems there is lack of info about this sub, besides specs of course


I would also be very interested to know how it compares to a Submersive if anybody has heard both.
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post #291 of 8265
9/21/09 at 8:48am
RMK what material did you use for your acustical panels in the back? They look nice. Did you make them yourself?
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post #292 of 8265
9/21/09 at 11:06am
Quote:
Originally Posted by RXPorlando View Post

RMK what material did you use for your acustical panels in the back? They look nice. Did you make them yourself?

Thanks, they are GIK Acoustics 244 Bass Traps. They are reasonable in price and the construction is OK. They have lots of color,fabric, trim options these days.
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post #293 of 8265
9/21/09 at 11:56am
Quote:
Originally Posted by James W. Johnson View Post

Hey Jeff, got any pics of the Quintuple yet ?

Fresh off the CNC, dry fit, not even assembled yet.




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post #294 of 8265
9/21/09 at 12:32pm
I'm starting to get very bad ideas for my next theater... Jeff if you do those in rosewood veneer i'll be all over them.
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post #295 of 8265
9/21/09 at 2:10pm
Wow, those look impressive.

Basic Quintuple 8 Specs from the JTR Forum site:

43" tall, 12.5" wide, 16.5" deep
56hz-20khz +/-3db
98db at 1 watt
up too 1200 watts recomended
129db output capability


Quote:
Originally Posted by Jeff Permanian View Post

Fresh off the CNC, dry fit, not even assembled yet.




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post #296 of 8265
9/21/09 at 2:36pm
Jeff you need to bring those to des moines so I can compare them to my def tech 7002's, and see how well it blends with a submersive, sorry didnt know about jtr when i was looking at subs.
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post #297 of 8265
9/22/09 at 11:46am
The Quintuple 8's have me seriously salivating and looking at my funds.

I haven't heard JTR speakers before but have been eying them as my next set since their introduction and since MK had them on the little tables Is there anyone in the LA area (I'm in Seal Beach) who graciously would let me listen to a set?
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post #298 of 8265
9/22/09 at 12:01pm
Wow, those are going to be potent. I better stop looking at this thread!
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post #299 of 8265
9/22/09 at 12:06pm
Hmmm: That could serve as a good center speaker to go with my AV123 LS9 line sources...
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post #300 of 8265
9/23/09 at 8:02am
I did some AB testing with and without Audyssey on last night. The Triple 8's still sound good with Audyssey on, but they sound substantially better without it. It is not a subtle difference. It is almost like Audyssey robs them of their midrange, you lose the feeling that the band is in front of you. It sounds like other people have had similar issues.
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