Official Power Sound Audio Subwoofer Thread - Page 544 - AVS Forum | Home Theater Discussions And Reviews
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post #16291 of 21971 Old 01-12-2015, 03:28 PM
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Originally Posted by AVAB View Post
It is good to hear the phase set at zero on both of your subs worked. Unfortunately my options for placement are limited, so I have not done a sub crawl. They can be moved forward, left or right some, but not enough that I would be able to notice a difference by just listening. I am hoping to use REW to see which position works best. I will need to try measuring each sub individually and see what it gives me, thanks for the advice!
No...but you could tell the difference by measuring.


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I included the graph with the limits you suggested, I will need to measure with audyssey on and post back when I get a chance.
Well, as you can see, you've got a ~40db deep, ~20hz wide null from 50hz to 70hz....not good. You need to move those subs around a bit to see if it can be filled in. Probably has already been filled in a bit by Audyssey, but the less EQ your system has to do, the better.

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You are out of phase in the crossover region...pretty common problem.
That dip is well below the crossover, bh.
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post #16292 of 21971 Old 01-12-2015, 03:28 PM
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What are you willing to spend on the x4100? I'm looking to buy a 5200 for the extra amp channels. Pm me if interested.
Thanks for the offer Brian but I'm a little short on cash for the next month or so. So I'm stuck waiting for a while.
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post #16293 of 21971 Old 01-12-2015, 03:29 PM
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Originally Posted by nitro1max1 View Post
Couple questions on the T-18. Is there 1 driver or 3? Is there a cross over setting on the sub? Very difficult picking out new sub. So many model, sizes, price. Was lean T-18 but not sure yet. What ever I buy, I will keep. Sending back a 200+ lbs sub sure can not be fun.
3 drivers. No built in crossover. XLR connector (but comes with RCA>XLR adapter).

Just in case you weren't aware, the T-18 doesn't qualify for the "free" in-home trial...if you want to send it back, you have to pay the shipping.
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post #16294 of 21971 Old 01-12-2015, 03:39 PM
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Oh, and BTW AVAB....you don't have to do a screen shot to post your REW graphs. See that little camera icon to the upper left of your graph window? Click that.

You have read the entire REW Guide linked in my sig, right??
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post #16295 of 21971 Old 01-12-2015, 03:52 PM
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Originally Posted by Alan P View Post
3 drivers. No built in crossover. XLR connector (but comes with RCA>XLR adapter).

Just in case you weren't aware, the T-18 doesn't qualify for the "free" in-home trial...if you want to send it back, you have to pay the shipping.
I thought it was just 1 driver myself. Cant really tell by the pics and specs just says the driver size.


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post #16296 of 21971 Old 01-12-2015, 04:07 PM
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It's where the "tri" in Triax came from.

Although, their not called by that name anymore........
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post #16297 of 21971 Old 01-12-2015, 05:05 PM
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Quote:
Originally Posted by Alan P View Post
No...but you could tell the difference by measuring.




Well, as you can see, you've got a ~40db deep, ~20hz wide null from 50hz to 70hz....not good. You need to move those subs around a bit to see if it can be filled in. Probably has already been filled in a bit by Audyssey, but the less EQ your system has to do, the better.



That dip is well below the crossover, bh.
for some reason I was thinking he was the one that had the crossover set at 60hz...that was James M. My mistake.

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post #16298 of 21971 Old 01-12-2015, 05:05 PM
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Originally Posted by Alan P View Post
It's where the "tri" in Triax came from.

Although, their not called by that name anymore........
Its just called a T-18, and it says 18" driver, (Not Drivers). And there is no picture of the back side. So how would anyone know? Now I can see why it cost so much. lol
  • Proprietary 18" driver made in the USA


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post #16299 of 21971 Old 01-12-2015, 05:10 PM
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Originally Posted by Red99 View Post
I thought it was just 1 driver myself. Cant really tell by the pics and specs just says the driver size.


Yea the website needs some updating. It should say " 3-18" proprietary drivers". Also some better pics would be nice...Tom I think it is time to start putting in 8 days a week and get the site updated.

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post #16300 of 21971 Old 01-12-2015, 05:20 PM
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Originally Posted by basshead81 View Post
Yea the website needs some updating. It should say " 3-18" proprietary drivers". Also some better pics would be nice...Tom I think it is time to start putting in 8 days a week and get the site updated.
Yeap. If you wasn't so far I would come take some backside pics and help you update the website. Of course, if you want to send one to me for a photo shoot I could do that for you. Might take a few weeks to get the pictures taken.


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post #16301 of 21971 Old 01-12-2015, 05:54 PM
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Originally Posted by Red99 View Post
Yeap. If you wasn't so far I would come take some backside pics and help you update the website. Of course, if you want to send one to me for a photo shoot I could do that for you. Might take a few weeks to get the pictures taken.

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post #16302 of 21971 Old 01-12-2015, 06:10 PM
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hey guys i was just browsing the psa web page and took my first look at the t-18. wow what a monster! did it take the place of the triax? i didn't happen to see it on the web page anymore unless i just missed it...

anyway i can't wait to hear everyones feedback on it. great looking product!

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post #16303 of 21971 Old 01-12-2015, 06:52 PM
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hey guys i was just browsing the psa web page and took my first look at the t-18. wow what a monster! did it take the place of the triax? i didn't happen to see it on the web page anymore unless i just missed it...

anyway i can't wait to hear everyones feedback on it. great looking product!
Yep, it's the old Triax upgraded with new 18 inch drivers and now called T-18. Alan and a few of the other guys on this thread have recently received the T-18 and have a lot of praise for it.
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post #16304 of 21971 Old 01-12-2015, 07:09 PM
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Yep, it's the old Triax upgraded with new 18 inch drivers and now called T-18. Alan and a few of the other guys on this thread have recently received the T-18 and have a lot of praise for it.
Have any details been released on the new 18" drivers?
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post #16305 of 21971 Old 01-12-2015, 10:18 PM
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Have any details been released on the new 18" drivers?
what do you want to know specifically?

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post #16306 of 21971 Old 01-12-2015, 10:26 PM
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what do you want to know specifically?
Just curious to know what it's based off of, we haven't seen any pics of it or anything. With the original 15's I remember see pics of it and a few details talked about and of course we'll all see pics of the new driver in the 15's based on a version of the LAB15.

It's just cool to see that kind of stuff, I think the PSA web page even had pictures of the drivers in the Triax didn't?
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post #16307 of 21971 Old 01-13-2015, 06:44 AM
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I am guessing we won't see any pics because of the select few that love to criticize a driver based on it's looks. I am betting the new 18" driver physically does not look nearly as beastly as the FI 15" driver. If I had to guess it is a 18-20mm xmax driver with a 10-12lb motor. It probably has higher sensitivity and lower inductance over the old driver as well. Put 3 of them in a cab fed with 4k watts of power and you have a Monster!
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The T-18 and XV30Fse are the two top of the line PSA subs. The T-18 is double the price... so I could go dual XV30Fse for the price of a single T-18. What are the pros and cons of each in a home theater environment? We will be building a house later this year with a dedicated theater room that will be 25L X 17W X 10H. This theater will be 99% movies/TV. I rarely just sit and listen to music. I'm also considering JTR products. In general, I have heard that ported is superior to sealed for home theater in fairly large rooms. Any advice/guidance would be appreciated.

Note: Subs will be behind a screen wall, so size and appearance are not critical.

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post #16309 of 21971 Old 01-13-2015, 08:02 AM
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Pro's for ported are higher spl's in larger rooms
Pro's for sealed are greater extension in sealed rooms.

I think t-18 will do very well in your room

But xv30's will as well. I would choose whichever you can do duals with
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post #16310 of 21971 Old 01-13-2015, 08:08 AM
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Originally Posted by Brian Fineberg View Post
Pro's for ported are higher spl's in larger rooms
Pro's for sealed are greater extension in sealed rooms.

I think t-18 will do very well in your room

But xv30's will as well. I would choose whichever you can do duals with
Thanks for the information! I'm going to do my best to make this room sealed. The door should be the only opening.

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post #16311 of 21971 Old 01-13-2015, 08:09 AM
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Originally Posted by Romans828 View Post
The T-18 and XV30Fse are the two top of the line PSA subs. The T-18 is double the price... so I could go dual XV30Fse for the price of a single T-18. What are the pros and cons of each in a home theater environment? We will be building a house later this year with a dedicated theater room that will be 25L X 17W X 10H. This theater will be 99% movies/TV. I rarely just sit and listen to music. I'm also considering JTR products. In general, I have heard that ported is superior to sealed for home theater in fairly large rooms. Any advice/guidance would be appreciated.

Note: Subs will be behind a screen wall, so size and appearance are not critical.
How many rows of seating will you have? If only one, dual XV30fs will probably be fine (if placed properly - which means maybe not behind the screen). If two rows, you will probably need four subs to smooth response.

I wouldn't recommend a single T-18 unless you are only going to optimize one seat...and, once again, that will require more placement options than you seem to be willing to consider.
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post #16312 of 21971 Old 01-13-2015, 08:11 AM
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Thanks for the information! I'm going to do my best to make this room sealed. The door should be the only opening. I apologize for my ignorance but how does extension impact the listening experience?
Extension below about 17-18hz requires very high SPLs to achieve any sort of tactile feeling. In a room your size, it would take multiple 18"s to make it worthwhile.

If you like a lot of output, go ported (or T-18s).
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post #16313 of 21971 Old 01-13-2015, 08:15 AM
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Originally Posted by Alan P View Post
Extension below about 17-18hz requires very high SPLs to achieve any sort of tactile feeling. In a room your size, it would take multiple 18"s to make it worthwhile.

If you like a lot of output, go ported (or T-18s).
How are those T-18's doing in your room Alan? Think they have enough power below 20hz to make it worthwhile to others with similar sized rooms and no allegiance to sealed subs?
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Go dual XV30's...dual subs are always better then a single 99% of the time. Now if dual T-18's are in the budget, by all means pull the trigger!

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Originally Posted by Alan P View Post
How many rows of seating will you have? If only one, dual XV30fs will probably be fine (if placed properly - which means maybe not behind the screen). If two rows, you will probably need four subs to smooth response.

I wouldn't recommend a single T-18 unless you are only going to optimize one seat...and, once again, that will require more placement options than you seem to be willing to consider.
We will have two rows of seating but 90% of the time, it will just be my wife and I sitting in the sweet spot.
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post #16316 of 21971 Old 01-13-2015, 08:20 AM
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How are those T-18's doing in your room Alan? Think they have enough power below 20hz to make it worthwhile to others with similar sized rooms and no allegiance to sealed subs?
Did you not see his graphs a few pages back? His T-18's are reference capable down to 16hz...so I would they are doing very well in his 5000^3 room.
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Go dual XV30's...dual subs are always better then a single 99% of the time. Now if dual T-18's are in the budget, by all means pull the trigger!
If I consider T-18's, especially duals, I would have to weigh that against something like the JTR Orbit Shifter (since it would be hidden) or S2 . I would find myself in that price range.
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post #16318 of 21971 Old 01-13-2015, 08:35 AM
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Originally Posted by Alan P View Post
Extension below about 17-18hz requires very high SPLs to achieve any sort of tactile feeling. In a room your size, it would take multiple 18"s to make it worthwhile.

If you like a lot of output, go ported (or T-18s).
I do want to get that tactile feeling going. I'm wondering if I will need to add transducers. Everyone seems to like the Crowsons but they cost as much as a good sub.
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post #16319 of 21971 Old 01-13-2015, 08:51 AM
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I do want to get that tactile feeling going. I'm wondering if I will need to add transducers. Everyone seems to like the Crowsons but they cost as much as a good sub.
What type of flooring is in the theater? Is it carpet over concrete? If so transducers could be needed but you don't need crowsons I have buttkicker a and they do a fantastic job and a fraction the cost
If it's on a suspended floor ou will get that tactile feeling from a much less amount of woofage
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post #16320 of 21971 Old 01-13-2015, 09:02 AM
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Did you not see his graphs a few pages back? His T-18's are reference capable down to 16hz...so I would they are doing very well in his 5000^3 room.

I thought the graph only showed reference at 20hz? Below that it dropped below 115dB, it was still very impressive though.
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