8x 18" LMS Ultra 5400s in 4 sealed enclosures - Page 18 - AVS Forum | Home Theater Discussions And Reviews
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post #511 of 528 Old 03-22-2012, 01:13 PM - Thread Starter
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Quote:
Originally Posted by beastaudio View Post

what is the SP Mix setting?

subs are sent the same signal.
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post #512 of 528 Old 03-22-2012, 02:17 PM
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Quote:
Originally Posted by notnyt View Post


subs are sent the same signal.

Yes but what about the HF's? Was that a single speaker, two, or all of them? That is my point, say the center channel is playing we want it to be flat, but what happens when an explosion occurs and now the front stage combines together with say a left side speaker, what does the response look like with those 4 speakers together? That is why I asked if EQing at the speakers is better or EQing each speaker individually at the LP. I am not sure what these auto setups do but just curious on what speaker or speakers were on during that sweep? Thanks again.

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post #513 of 528 Old 03-22-2012, 02:24 PM - Thread Starter
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that sweep was all the subs and left and right speakers. EQing anywhere but the LP is silly, since you want the response to be flat at the LP.
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post #514 of 528 Old 03-22-2012, 02:35 PM
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Quote:
Originally Posted by notnyt View Post

that sweep was all the subs and left and right speakers. EQing anywhere but the LP is silly, since you want the response to be flat at the LP.

Single LP or multiple? I have 7 seats but really ultilize the front 4.

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3 Inuke NU4-6000 amps for all speakers.
Speakers- 7 Behringer B215XL's, 4 212xl's for ceiling speakers.
Front subs 8 SI 18ht ported SLLT powered by Peavy IPR 7500
Rear subs 4 SI 18HT ported SLLT powered by Inuke 6000.
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post #515 of 528 Old 03-22-2012, 02:43 PM - Thread Starter
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It's virtually the same in any seat on my couch. I don't EQ for the seats far off to the side.
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post #516 of 528 Old 03-22-2012, 02:52 PM
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Quote:
Originally Posted by notnyt View Post

It's virtually the same in any seat on my couch. I don't EQ for the seats far off to the side.

Sounds good to me. I EQ'd my subs to the LP and every seat was very similar in response anyways. I wonder if I would be that lucky for the speakers too? Maybe all the treatments will help a bunch, I will give it a try and see what happens.

Marantz 7702 Atmos
3 Inuke NU4-6000 amps for all speakers.
Speakers- 7 Behringer B215XL's, 4 212xl's for ceiling speakers.
Front subs 8 SI 18ht ported SLLT powered by Peavy IPR 7500
Rear subs 4 SI 18HT ported SLLT powered by Inuke 6000.
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post #517 of 528 Old 01-10-2013, 09:10 AM
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Not sure why I had not seen this thread earlier - this is amazing!!

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post #518 of 528 Old 10-02-2013, 04:51 PM
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I really like the total overkill here. I am still hoping to try some of those lms 5400. I guess i would need four to make two cabs and power each cap with one amp bridged at 8 ohms. All I need is around 5000 plus build costs.
LOL. I will be waiting some time, as I can't fit any more subs in my present situation. Try out the vega amps and see what a difference it makes.

A Good amplifier requires a adequate power supply, It does not matter what the amplifier is capable of if the power supply will not provide the power required. Most amplifiers have under rated power supplies. It is up to you to make sure you get the ones that are
least under rated if at all.
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post #519 of 528 Old 12-13-2014, 04:51 PM
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Have you even taken a full volume SPL reading?

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"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."
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post #520 of 528 Old 12-13-2014, 05:32 PM
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What advantages do the LMS drivers have versus the dayton 18" drivers? I am not sure if the Dayton were available at the time you started your build. Seems like a whopper price difference but really subs this big are something folks are likely to only build once in their lifetime so why not I suppose.

What was the final wattage / resistance per channel / etc. on this build?

Having done 8x dayton ultimax in 4 boxes @ 2500 watts per channel... Im pretty damn happy with the overall sound. I cant really imagine needing a lot more bass in my room. I know some folks are more hardcore bassheads and like to go for "competition level" bass.
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post #521 of 528 Old 12-13-2014, 05:49 PM
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Quote:
Originally Posted by blazar View Post
What advantages do the LMS drivers have versus the dayton 18" drivers? I am not sure if the Dayton were available at the time you started your build. Seems like a whopper price difference but really subs this big are something folks are likely to only build once in their lifetime so why not I suppose.

What was the final wattage / resistance per channel / etc. on this build?

Having done 8x dayton ultimax in 4 boxes @ 2500 watts per channel... Im pretty damn happy with the overall sound. I cant really imagine needing a lot more bass in my room. I know some folks are more hardcore bassheads and like to go for "competition level" bass.
LMS has a better motor, less distortion, higher power handling, more xmax, more output... etc...

They are not the same.
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"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."
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post #522 of 528 Old 12-13-2014, 06:34 PM - Thread Starter
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Quote:
Originally Posted by Mfusick View Post
Have you even taken a full volume SPL reading?
Can't. Mic/meter doesn't go that loud :/ I'd have to take one outside and measure further away. Needless to say I'm not moving a 400+ lb enclosure anyway. They modeled like WinISD said they would, except I picked up more on the upper end over the sealed enclosures, which it didn't show.

Quote:
Originally Posted by blazar View Post
What advantages do the LMS drivers have versus the dayton 18" drivers? I am not sure if the Dayton were available at the time you started your build. Seems like a whopper price difference but really subs this big are something folks are likely to only build once in their lifetime so why not I suppose.

What was the final wattage / resistance per channel / etc. on this build?

Having done 8x dayton ultimax in 4 boxes @ 2500 watts per channel... Im pretty damn happy with the overall sound. I cant really imagine needing a lot more bass in my room. I know some folks are more hardcore bassheads and like to go for "competition level" bass.
I'm running 4 ohms per channel. Stronger motor and other factors lets you also run a smaller enclosure and have more output near tune. The UM18 and the SI18 show a bit of weakness in that area compared to the LMS or the UXL18

Quote:
Originally Posted by Mfusick View Post
LMS has a better motor, less distortion, higher power handling, more xmax, more output... etc...

They are not the same.
This.
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post #523 of 528 Old 12-14-2014, 04:53 AM
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Excellent, thanks for the info. I wish i had room for the width and depth of the LMS drivers. They would not fit in my in my tall/shallow/narrow sealed boxes that I mounted in my specialized wall spaces. Had to settle on 8x15" dayton umax drivers. It is defintely possible to bottom the out if you go crazy. I will never push them to limit for fear of damaging them ...
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post #524 of 528 Old 12-14-2014, 12:37 PM - Thread Starter
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the ultimax drivers seem like they might soft bottom, not sure, either way, they don't hit the come like the lms.
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post #525 of 528 Old 02-26-2016, 07:20 AM
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This is Awesome!

At the moment I was on the fence of buying a second SVS PC13 Ultra. I don't think I will now! I think I will sell the mine and build two of these bad boys. I'm not sure how it would fit in my room but would love to experience more bass. Only thing is I'm in Australia and everything cost more and we have less access to equipment range that you guys in the USA have.

Thanks for sharing!!!
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post #526 of 528 Old 02-26-2016, 08:05 AM
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LMS-Ultra drivers used in this system are currently out-of-production.
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post #527 of 528 Old 02-26-2016, 08:26 AM
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Quote:
Originally Posted by Scott Simonian View Post
LMS-Ultra drivers used in this system are currently out-of-production.
Two questions if you know:

Think they will ever make them again?

Did anyone other than the DIY community buy these?
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post #528 of 528 Old 02-26-2016, 09:38 AM
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Quote:
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Two questions if you know:

Think they will ever make them again?

Did anyone other than the DIY community buy these?
Yes and yes. Assuming the second question was about the Ultra's.

TC Sounds has gone away and come back and then gone away and come back and then gone away and come before. I'm sure they will be back again.
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