Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!! - Page 44 - Home Theater Forum and Systems - HomeTheaterShack.com

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post #431 of 446 Old 07-25-12, 04:08 AM
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

I was having a discussion of why a HPF should be used with sealed LMS Ultra's when Notnyt chimed in and told the story of how he bottomed his 8 pack. He was running his system at or over reference levels and luckily didn't damage anything but it scared him into always using a HPF.

I always ran my LMS Ultra's with a HPF, better safe than sorry I figured after seeing that mushroomed LMS Ultra. I really don't know if it just just happens, no warning than bottom, but I would figure that's the case. The other TC sub I bottomed, going fine then slam, really makes you jump fast and there was no audible warning before hand. I was running that sub without a HPF and a decent amount of boost so I had it coming.

I think with the LMS Ultra it is so clean that even though it measures loud it doesn't sound as loud because of the lack of distortion. Distortion adds to the perceived volume so you tend to want to turn up the volume with a low distortion masterpiece like the LMS Ultra.

Maybe take some time to learn the limits of your LMS ultra's before giving them the same workout.
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post #432 of 446 Old 07-25-12, 04:32 AM
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Oh yeah...

I always stretch before heavy lifting...

I still have a bit to learn in the hobby, so eventually I plan to get the protection I will jeed in place so I don't damage my gear from carelessness...
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post #433 of 446 Old 07-26-12, 08:02 AM
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

The problem with the "Oh I'll get some kind of warning..., right?" mode of operation is "how do you know when you have had your warning?" Maybe you have already had yours.

What problem are you referring to... overheating from chaffing or wearing through copper coil windings from chaffing? Hitting bottom is the least of your worries.

Heat caused the deformities you saw and you will not see "it" coming.

We believe everything we tell ourselves..., don't we??
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post #434 of 446 Old 07-26-12, 10:41 AM
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Quote:
Gregr wrote:
The problem with the "Oh I'll get some kind of warning..., right?" mode of operation is "how do you know when you have had your warning?" Maybe you have already had yours.

What problem are you referring to... overheating from chaffing or wearing through copper coil windings from chaffing? Hitting bottom is the least of your worries.

Heat caused the deformities you saw and you will not see "it" coming.
If it was heat, I would have "smelled" it coming.

The deformities YOU saw were from the video recording latency of my camera phone.

In person, the sub was maintaining it's linearity, not deforming.

While I agree that I was pushing the sub hard, it took it in stride... Just did it for everyone's entertainment.

I'd be willing to bet that when I take videos of the Ultra's in action, it will be similar to the W6.
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post #435 of 446 Old 07-26-12, 08:31 PM Thread Starter
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

that W6 was really getting with it!!!!!!! I was waiting for it to tear appart. I tossed the idea around on the super amp, but really can't justify getting it. With kids in the house and only one sub, i could really have no need for that much power. now that the new EQ is in place, the crown ce4000 or more than enough..............Also another deciding factor is, im getting married in hawaii next week and looking to buy a motorcycle as my wedding gift to myself lol. So money is all tied up
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post #436 of 446 Old 01-27-14, 08:54 PM Thread Starter
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

I started this build on 4/30/2012 its now 1/27/2014. Still have the same setup and it has never moved from its spot next to the TV. This build was WELL worth the time, effort, money. I honestly believe the sub sounds better now, almost 2 years later, than when I first built it. when someone new comes over to watch a movie, its always ... ""WOW!!!""...or..."that sounds awesome" Thanks again Shack for all your help, couldn't have done it without ya
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post #437 of 446 Old 01-28-14, 04:37 PM
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

That's awesome - I'm very happy with my Ultras too. There are very, very nice subs for sure.
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post #438 of 446 Old 01-28-14, 05:57 PM
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

Quote:
brandon123 wrote: View Post
I started this build on 4/30/2012 its now 1/27/2014. Still have the same setup and it has never moved from its spot next to the TV. This build was WELL worth the time, effort, money. I honestly believe the sub sounds better now, almost 2 years later, than when I first built it. when someone new comes over to watch a movie, its always ... ""WOW!!!""...or..."that sounds awesome" Thanks again Shack for all your help, couldn't have done it without ya
`
LOL good to hear it hasn't moved and is still operational.
`
I recently lent my LMS out for a GTG. Packing, carrying, and transporting the 6 cu ft. box with the LMS mounted inside was an interesting challenge. I decided having the driver positioned facing up was safest way to move it. Moving the box with the driver on it's side with the driver hanging from the mounting bolts would put too much stress on the MDF at the bolt locations. If the transport vehicle hit a RR crossing or pothole I was worried the driver would get torn out of it's mounting. I used nylon straps with ratchet clamps to tighten the straps around the box. I had two straps running under the box fastened to a heavier strap running parallel to the ground about 10 inches from the top of the box. This arrangement allowed two men to lift by the parallel strap lifting against the straps that went under the box.
Anyway the box and driver arrived safely and was fully functional when set up.
This is the first time I've heard my unit played outside my house in a different environment. My laptop which controls the amp's EQ was down so the unit played with my house curve logged in the amp.
It did well. The GTG members wanted the Crown amp hooked up bridged for 3200 watts. I usually ran it with one channel @ 1200 watts.
The unit filled that open listening area with more low end than anything else being displayed in the house. I had my demo test disc that had single frequencies from 10Hz to 100Hz spaced at 10Hz steps. The cone JUMPS with 3200 watts at the 10HZ setting. It looks like full extension to me. Had to be close to the bottom. The dubstep demo disc was vibrating the concrete floor of the living room and the various pieces of furniture. One of the owners lamps traveled across the end table and tilted against the wall without breaking. The house had not been LMS prepared.
The LMS was paired with two electrostatic speakers. The cross-over point needed to be changed from 80Hz to 120Hz for best integration with the electrostatics. After the loud demo stuff was over and the more detail specific material was offered, the SQ of the LMS was very evident playing with the electrostatics.
Only problem that resulted was that most members at the GTG now want an LMS.
My LMS is about 6 years old and hasn't had a problem. The LMS will suck up all the juice in an XTi 4000. It's a good match bridged. I don't need that much volume. I get by using one channel for the LMS and the other channel for dual RCF 21's in a 9 cu ft. sealed enclosure.
Good luck Brandon. Thanks for all the fun.
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post #439 of 446 Old 03-18-16, 01:48 PM Thread Starter
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

Crazy its been 2 years since that last update. Still running strong and hasn't budged from its spot. I've been Gearing up to completely redo my truck. Receiver, all speakers, and adding sub, strictly sound quality, nothing to hear from blocks away. Since my first post here, I started working as an engineer and my main tool is Solidworks 3d modeling. Man does it make designing enclosures a whole lot easier. I'm debating on redoing this LMS-5400 enclosure. Ill be able to get it down perfectly with this software.

Last edited by brandon123; 03-18-16 at 01:58 PM.
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post #440 of 446 Old 03-18-16, 03:44 PM
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Re: Sealed TC Sounds LMS Ultra 5400 18" NOOB STYLE!!

If you make another enclosure for the 5400 let us know how it turns out.
I'm still using my 5400 and the 2 21inch RCF NEOs for the bottom end.
I'm now using the XTi 4000 bridged for the 5400 and a Peavy IPR 3000 driven by a Behringer Ultra Curve Pro for the RCF 21s.
I'm so spoiled by the sound quality and power of the lower end that when I listen to other systems for any length of time,
I get pissed off.
My wife decided to buy a system to go along with her new HD 32 flat screen TV. She bought a JBL sound bar and the matching subwoofer to go along with it.
I was in the store when she bought it. She made me listen to ALL the sound bars and subwoofer setups Best Buy had, about 10 of em. I'll admit the JBL sounded the best of all of them even though the sub only had a 6.5 inch woofer. My wife thought she had the equal to my stuff down in the theater room.
N O T !
It turns out that although the JBL sub puts out BASS, it's all one note and THAT gets really aggravating after about 20 minutes. Who wants to listen to a
70 HZ note all night long whether it's for a man's voice, a roaring inferno, or the pods emerging in "War of the Worlds".
All you guys know what I'm talking about.
All those days of experiments we made and all those different brands of sub drivers and a thousand different box builds and determining how much amp power was needed to satiate our hunger for loud, literal gut wrenching, pants flapping, wall moving, earth shaking subwoofer power, finally paid off . . . . and I am at ease with the world, MY world . . . . where 10HZ on down is the norm . . . . . where 100dbs @ 20HZ is required . . . . . and the meek may not enter . . . . and our hearing won't last past 5 years.
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