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Official JTR speaker thread - Page 9

post #241 of 8265
9/16/09 at 7:14pm
I have a ATI 300watt x7 amp 450watt with my triple 12s that I just got,the ATI hardly gets warm.
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post #242 of 8265
9/16/09 at 7:15pm
Quote:
Originally Posted by James W. Johnson View Post

Can someone recommend a few amplification options for JTR speakers? I am guessing they are a pretty heavy load , especially if cranked . And if I buy some they are definately gonna get used hard.

thanks

Hey James, I have an Adcom GFA 5503 that I have used with 888s and Triple 12LFs. Prior to my JTRs I had some RAW acoustics Apex. Long story short clip lights was always an issue when I would get on the volume. With JTRs I have never seen clip lights again, so on the contrary I would say easy load.
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post #243 of 8265
9/16/09 at 7:24pm
Quote:
Originally Posted by gpmbc View Post

Hey James, I have an Adcom GFA 5503 that I have used with 888s and Triple 12LFs. Prior to my JTRs I had some RAW acoustics Apex. Long story short clip lights was always an issue when I would get on the volume. With JTRs I have never seen clip lights again, so on the contrary I would say easy load.



Hmmm, thanks for that info gpmbc.
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post #244 of 8265
9/16/09 at 7:33pm
I keep reading about the mid bass slam the 12's offer over the 8's

Would a trlp 12 crossed over at 50hz to captivator offer more SQ, dynamics than a trlp 8 crossed over at 80hz, would I be missing anything with 8/cap combo. Would I need a submersive
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post #245 of 8265
9/16/09 at 7:35pm
Quote:
Originally Posted by bodhisafa View Post

I have a bonus room above my garage that has been turned into a HT room. I too am interested in a JTR package with pro amps (price vs power), but the noise created by the fans would make it difficult to enjoy a movie.

Mod the fans!! It costs about $10 per fan and it takes about 5 minutes.

I have 4 pro amps and they are silent enough that when any sound is playing there is zero issues.
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post #246 of 8265
9/16/09 at 8:01pm
Heres my room 13W 20L 8H tallest point
Front row is about 12Ft. away 2nd row about 16ft. Can be moved
What do you guys recomend 8/12...Captivator/Submersive
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post #247 of 8265
9/16/09 at 8:57pm
Bodhisafa, my room is really open and the back wall to the speakers is 20 feet away. I have not found the limits of my 888s. With your room size the 888s with an appropriate sub to reach up to 80hz or so with authority will have ridiculous output. Diggin your room btw!!
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post #248 of 8265
9/17/09 at 5:49am
I like them ht love seats,who make them?
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post #249 of 8265
9/17/09 at 7:28am
I'm not sure if it's a problem with the setup, but I haven't had this problem with any of the previous centers. I'm only using a triple 8 for the center at the moment. I was planning on switching out the rest of the fronts when I can, but I need to address a problem first. Are any of you guys noticing some "boxiness" coloration from the triple 8's. I have moved it away from the wall (about 2.5') and the it's on a stand above the 18".

I notice that dialog seems to be coming from a box with hints of almost echo-ie coloration. I level matched it and am not using any type of room correction at the moment. Powering with a gemstone (200x7).

Any ideas.
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post #250 of 8265
9/17/09 at 7:29am
Quote:
Originally Posted by dholmes54 View Post

i like them ht love seats,who make them?

+1
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post #251 of 8265
9/17/09 at 7:47am
That is one nice looking room, good job bodhisafa!
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post #252 of 8265
9/17/09 at 8:52am
Quote:
Originally Posted by biffbyun View Post

I'm not sure if it's a problem with the setup, but I haven't had this problem with any of the previous centers. I'm only using a triple 8 for the center at the moment. I was planning on switching out the rest of the fronts when I can, but I need to address a problem first. Are any of you guys noticing some "boxiness" coloration from the triple 8's. I have moved it away from the wall (about 2.5') and the it's on a stand above the 18".

I notice that dialog seems to be coming from a box with hints of almost echo-ie coloration. I level matched it and am not using any type of room correction at the moment. Powering with a gemstone (200x7).

Any ideas.

I have no idea what "boxiness" is supposed to sound like but I can say that my triple 8 center has never seemed to echo or sound localized/tinny at all to me.

My first suspicions would be to check for phase issues, if not that, Jeff may have to step in.
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post #253 of 8265
9/17/09 at 9:02am
Jeff thought that it may be from close boundaries so I put it on a carpet and moved it further into the room away from the walls. The "boxiness" sounds like the actors are talking inside of a box. Kind of a hollow sound. Mind you, this is not objectionable, as it is in fact subtle, but definitely noticeable. I have not experienced this in the past. I have to say that intelligibility of dialogue as increased though. when I first noticed it, I thought it was the source, but it seems to be consistent. I don't think it would be a phenomenon caused by phase, but I will try that suggestion.
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post #254 of 8265
9/17/09 at 9:07am
Quote:
Originally Posted by biffbyun View Post

I notice that dialog seems to be coming from a box with hints of almost echo-ie coloration.

Could be modal ringing or some other form of room resonance that is affecting the dialog range. Acoustic treatment and bass traps in particular will help you if that is the case.

Regards,
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post #255 of 8265
9/17/09 at 9:10am
Quote:
Originally Posted by goneten View Post

Could be modal ringing or some other form of room resonance that is affecting the dialog range. Acoustic treatment and bass traps in particular will help you if that is the case.

Regards,

Ok, I'll look into that as well. My area dimensions are not the most ideal, but it is a dedicated space with 4" OC703 panels at all the first reflection points (even the ceiling). Could it be a loose coxial driver? I mean, the thing is built like a tank so I'm doubtful.
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post #256 of 8265
9/17/09 at 9:11am
Do you already have LCR speakers? The easy test would be to try one of the others in place of your current center channel.
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post #257 of 8265
9/17/09 at 9:15am
Quote:
Originally Posted by DaveUpton View Post

Do you already have LCR speakers? The easy test would be to try one of the others in place of your current center channel.

Yeah, that's the problem, I don't have the LCR, although that's my goal. I started with the center to get an idea. Currently it is flanked by 2 Mackie HR824 studio monitors. Like I said, I didn't have this problem with the other centers before it.
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post #258 of 8265
9/17/09 at 9:22am
Jeff may suggest you look to confirm the internal wiring is alright - but I just recalled a similar situation with an AV123 center channel (also heavy). The UPS guy had dropped the box and one of the drivers was damaged causing it to sound very strange.

I'm sure as a last resort Jeff will gladly check it out - but shipping it back is never fun.
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post #259 of 8265
9/17/09 at 12:44pm
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.
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post #260 of 8265
9/17/09 at 1:05pm
Yes I have 5 x 2010 triple 8's .. also have a Rocket setup at home, I'd say the triple 8 and bigfoot have a similar ability to throw a transparent soundstage for dialogue. The T8 is actually remarkably clear for dialogue - so what you're experiencing doesn't sound right at all.

Good luck..
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post #261 of 8265
9/17/09 at 1:34pm
Wow, Jeff just contacted me and he wants to check it out. If he can't figure it out no one can.
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post #262 of 8265
9/17/09 at 2:19pm
Quote:
Originally Posted by biffbyun View Post

I'm not sure if it's a problem with the setup, but I haven't had this problem with any of the previous centers. I'm only using a triple 8 for the center at the moment. I was planning on switching out the rest of the fronts when I can, but I need to address a problem first. Are any of you guys noticing some "boxiness" coloration from the triple 8's. I have moved it away from the wall (about 2.5') and the it's on a stand above the 18".

I notice that dialog seems to be coming from a box with hints of almost echo-ie coloration. I level matched it and am not using any type of room correction at the moment. Powering with a gemstone (200x7).

Any ideas.

Hi biffbyun,

Here are some things to consider that might be relevant:

1) Are your frontal speakers in an ITU Semi-circle? That is, do you have them equidistant from your listening position? If not, you may be experiencing some "time alignment" echo or phase issues that your receiver isn't correcting.

2) Have you tried listening to the center ALONE, to see if still has the echo/boxiness? If your L&R mains use a different order X-over they may be introducing phase issues. If it looses the boxiness all by itself, then it is interactive degradation imposed by any number of phase, crossover, and arrival issues from unlike speakers.

3) Try running the center in "reverse phase" just as an experiment to see if that is part of it.

4) Make sure that the JTR is not sitting on a stand where the bottom of the speaker and the stand make a corner. It should be sitting with at least 1" out over the stand or shelf.

5) If you have a coffee table or hard surface between you and the center speaker remove it. The reflection from such can play havoc with the sound setting up a really.

Hope that gives you some things to try.
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post #263 of 8265
9/17/09 at 6:30pm
Quote:
Originally Posted by biffbyun View Post

Wow, Jeff just contacted me and he wants to check it out. If he can't figure it out no one can.

Its still possible that its room related. Wide dispersion speakers image better however are more reactive with reflexive environments.
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post #264 of 8265
9/17/09 at 6:46pm
Quote:
Originally Posted by Jeff Permanian View Post

Its still possible that its room related. Wide dispersion speakers image better however are more reactive with reflexive environments.

Guess there is no free lunch. Tight pattern control equals less room interaction but smaller sweet spot. Wide dispersion-sweet spot is everywhere but plays more off the surroundings. Time to get my room treatment on! Now just have to figure out what color I wanna be stuck with forever: decisions, decisions.
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post #265 of 8265
9/17/09 at 6:55pm
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
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post #266 of 8265
9/17/09 at 7:04pm
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 haven't sold any because I've kinda holding off until the new driver is available. I have one with a nice high excursion 12" (not Growler driver) and am in the middle of building a second.
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post #267 of 8265
9/17/09 at 7:24pm
How will the new driver change the character of the sub, more dynamic, SQ, better frequency response
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post #268 of 8265
9/18/09 at 6:41am
Hi John, wow some really good suggestions.

1) the speakers are not equidistant but I have measured their distances manually and set them in the receiver setup. In fact, they are all within 1 feet distance-wise from the listening position.

2) I have tried the center alone and it's still there. The x-over is set at 80Hz across the board.

3) no dice on the phase reversal. I tried that one last night.

4) It overhangs the stand by a good amount. Much more than an inch but that's just because it's a BIG speaker.

5) I do in fact have a coffee table that I moved out of the way. It didn't help my problem, but I did notice a distinct improvement in clarity. Thanks for that tip. I will go coffee tableless whenever I can now.


Quote:
Originally Posted by bioforce View Post

Hi biffbyun,

Here are some things to consider that might be relevant:

1) Are your frontal speakers in an ITU Semi-circle? That is, do you have them equidistant from your listening position? If not, you may be experiencing some "time alignment" echo or phase issues that your receiver isn't correcting.

2) Have you tried listening to the center ALONE, to see if still has the echo/boxiness? If your L&R mains use a different order X-over they may be introducing phase issues. If it looses the boxiness all by itself, then it is interactive degradation imposed by any number of phase, crossover, and arrival issues from unlike speakers.

3) Try running the center in "reverse phase" just as an experiment to see if that is part of it.

4) Make sure that the JTR is not sitting on a stand where the bottom of the speaker and the stand make a corner. It should be sitting with at least 1" out over the stand or shelf.

5) If you have a coffee table or hard surface between you and the center speaker remove it. The reflection from such can play havoc with the sound setting up a really.

Hope that gives you some things to try.
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post #269 of 8265
9/18/09 at 6:43am
Quote:
Originally Posted by Jeff Permanian View Post

Its still possible that its room related. Wide dispersion speakers image better however are more reactive with reflexive environments.

Jeff, I was doing some testing and trying some suggestions last night and I noticed that some of the dampening material on the inside may be loose from the little I could see through the slots above and below the drivers. I'm assuming this could cause that boxiness? No?
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post #270 of 8265
9/18/09 at 6:58am
Quote:
Originally Posted by Jeff Permanian View Post

I haven't sold any because I've kinda holding off until the new driver is available. I have one with a nice high excursion 12" (not Growler driver) and am in the middle of building a second.

So are there going to be different drivers for the Growler and the Captivator?
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