SI 24z build....8 of em' - Page 23 - AVS Forum
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post #661 of 679 Old 04-08-2014, 05:53 PM
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Quote:
Originally Posted by bossobass View Post

Quote:
Originally Posted by Shan87 View Post

Most everyone running sealed LMS's all run 2 per FP14000 clone... 2400watts is only 600 more than an EP2500/4000 which made my Ultra 5400's seem not so impressive. In order to bottom them out on any normal material you'll have to run a significant amount of boost in the very low bass. So yes, much more power.


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Shan,

The EP4000 does not put out even close to 1800 watts in my opinion. [ insert amp testing thread here ] I've told this story before, actually maybe a page or 2 back in this thread. I went over to Coach's and heard his pair of DO SI18s (4 subs) with each DO enclosure pushed by a bridged EP4000. Comparing them to my LMS 5400s, I was somewhat underwhelmed. I expected the 4 SI18s to perform similarly to my pair of LMS 5400s. Well, I had taken over my SpeakerPower SP-8000 (2x4000w@2ohms, 2x2400w@4ohms) so we hooked up a channel to each cabinet. Well, the subs truly came alive and sounded very similar to the LMS 5400s (audible memory being what it is). Coach ended up switching the Behringer amps for Peavey IPR7500s and he is much happier.

Uh, today I switched my Jr bacon cheeseburger for a Baconator, and it was much better as well. The EP 4000 may not have been putting out enough power, that is all based on how much input voltage it receives... 50x or 32db in the case of the EP4000. Substitute an amp with more voltage gain, and voila~ like magic with the same receiver / pre volume setting it's got more power.


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I run a clone myself but based on Data-Bass's measurements at 7 hz an Ultra can take 130 volts(Max long term output) with an impedance of 4.5ohm at 7 Hz which would put it at 3600 watts. I was just simply saying that there should of been a bit more in the tank is all.


If there is someone here willing to play a 7 hz 130 volt sinewave, for more than a few milliseconds, I am all for it, I will even donate $ 5 bucks to buy the sucker a new top assembly. Make sure the attempt is filmed as well, with a voltmeter on the terminals.


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We then spent the day thrashing the HS 24, LMS-U's, [with an SP2-8000 4KW/CH into 2 ohms and IPR 7500, both of which shut down from over current/thermal abuse... no bottoming]

Awesome, I have put over 100 watts into a 1" tweeter as well for a short period of time, one that was rated at 10 watts. You can put over 150 watts into an Klipsch K-77 tweeter when you cycle it on 50 msec, and off for 50 msec at 20khz.

I've spent 10 years using 10-12dB L/T signal shaping with over 100 drivers. Although I always enjoy new information, you have none to offer on this subject.

I don't need to know the room gain profile and simulations are irrelevant. To destroy a world class driver one has to either be clueless or set out to do it in the first place. If my posts assume neither is the case, well, duh.

So the people bottoming their drivers are clueless?

You also rejected the results of the special test that Illka did for you with the LMS in a small box vs a large box, when the small box returned more distortion... rolleyes.gif

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post #662 of 679 Old 04-09-2014, 06:17 AM - Thread Starter
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My two Speaker Power SP12ks are officially paid for and getting produced.

I laid out the baffle wall a few times last night to see what would work out best. With the placement of the mains and the sheer size of them, they get in the way of optimal placement if I went with four D/O encolsures. The 8 single woofers placed at 1/4s actually works outperfectly with the layout of the mains though. It will smooth response more and hopefully still couple just as well. I just have to be sure my enclosures are nice and stout. They'll be 54" tall by 32" wide and 24" deep, double wall 3/4" and triple baffle included. That will give me a gross volume of 16.635ft3 before driver and bracing. 1.6ft3 should be a close enough estimate to get it just right, throw some lining on the walls and a bit of stuffing in and go. The woofer placements along the height of there respective enclosures will be different in order to get placement right due to stage height etc, I'll post up some pics of the sketch later to show.
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post #663 of 679 Old 04-09-2014, 07:25 AM
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Make sure you brace the crap out of that cabinet. I look forward to your impressions of the fan noise of these amps also. Power wise I have no doubts there. Bt I wont have an equipment room so I am curious of the fans.
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post #664 of 679 Old 04-09-2014, 07:42 AM - Thread Starter
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Originally Posted by chrapladm View Post

Make sure you brace the crap out of that cabinet. I look forward to your impressions of the fan noise of these amps also. Power wise I have no doubts there. Bt I wont have an equipment room so I am curious of the fans.

I will let you know as soon as they get here. I have a spot for them, so I didn't even research that part. I will fire em' up and pound on them to give you a good idea of how loud they are. How far will they be from LP?? any containment at all?
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post #665 of 679 Old 04-09-2014, 07:49 AM - Thread Starter
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I just realized something very troubling....between the SEOSR cabinet rebuild, my surrounds and the SI24z I have to build 19 enclosures to get this joint up and running eek.gif Not to metion that 11 of them (the seosr and 24z) are big enough to be coffins! Nothing like a nice spring project I guess. Time to break out the new table saw and get moving. My 24s should be here next week and I can lay out the bracing pattern once I have them. My wife's gonna hate me!!
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post #666 of 679 Old 04-09-2014, 07:50 AM
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LOL about 7ft away with no containment. They will most likely be idling by with anything I do. I will only have a small group of 15's on the amp. I cant compete with all you guys and your subs. For me I will very slowly be trying to get four 15's for my setup. I dont have the room for the 24's other wise I would go that route for sure. I have to do more of a stealth install. SO 2 15's in the beginning off one channel should be good.

I dont tend to push my system very hard if ever. I have put cracks in my walls already from past subs. BUT for now I will have to use a pair of cabinets in horrible placement so more SPL will be needed/used. Anyways enough about me.

And when doing that many cabinets you should go ahead and build a bunch of jigs for your cutting. Sorry if you were already thinking this. thought I would mention it .
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post #667 of 679 Old 04-09-2014, 08:37 AM - Thread Starter
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Originally Posted by chrapladm View Post

LOL about 7ft away with no containment. They will most likely be idling by with anything I do. I will only have a small group of 15's on the amp. I cant compete with all you guys and your subs. For me I will very slowly be trying to get four 15's for my setup. I dont have the room for the 24's other wise I would go that route for sure. I have to do more of a stealth install. SO 2 15's in the beginning off one channel should be good.

I dont tend to push my system very hard if ever. I have put cracks in my walls already from past subs. BUT for now I will have to use a pair of cabinets in horrible placement so more SPL will be needed/used. Anyways enough about me.

And when doing that many cabinets you should go ahead and build a bunch of jigs for your cutting. Sorry if you were already thinking this. thought I would mention it .

I'll set one up 7ft away in my living room and pound the snot out of it..let you know how loud the fan is. We're all stupid and crazy dude...there is absolutely no need for th amount of...wait what am saying..nevermind biggrin.gif

That's a great idea, thanks! I honestly wasn't thinking that. Last time around I just made a paper template, but making something better would sure make it easier. Thanks for the idea sir!
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post #668 of 679 Old 04-09-2014, 09:17 AM
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Sounds great thanks. And yah the templates make things go so much quicker. Takes a while for the first one and then



Look forward to your builds and pictures.smile.gif
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post #669 of 679 Old 04-09-2014, 09:23 AM
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Quote:
Originally Posted by ChopShop1 View Post

I just realized something very troubling....between the SEOSR cabinet rebuild, my surrounds and the SI24z I have to build 19 enclosures to get this joint up and running eek.gif Not to metion that 11 of them (the seosr and 24z) are big enough to be coffins! Nothing like a nice spring project I guess. Time to break out the new table saw and get moving. My 24s should be here next week and I can lay out the bracing pattern once I have them. My wife's gonna hate me!!

I know! It's crazy overwhelming to do all this at once. Sometimes you just gotta take a step back even if just to rest the mind.

You're doing great, bro. Keep it up! smile.gif

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post #670 of 679 Old 04-11-2014, 12:38 PM - Thread Starter
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Thanks Scott!! I'm gonna keep the train moving
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post #671 of 679 Old 04-11-2014, 03:39 PM
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post #672 of 679 Old 04-12-2014, 06:56 PM
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"Two Seaton Sound specials on the way.....Speaker Power SP12,000s!!!"

congratulations.

are you planning for 240v?

Listen. It's All Good.
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post #673 of 679 Old 04-12-2014, 07:02 PM - Thread Starter
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"Two Seaton Sound specials on the way.....Speaker Power SP12,000s!!!"

congratulations.

are you planning for 240v?

Yes sir.
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post #674 of 679 Old 04-12-2014, 07:11 PM
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I forgot about the 240vac. So, great to see it would be the same version I get if I am able to get one later.
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post #675 of 679 Old 04-12-2014, 07:22 PM
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cool.

Listen. It's All Good.
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post #676 of 679 Old 07-18-2014, 09:06 AM
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Hey Chop, any updates here?
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post #677 of 679 Old 07-18-2014, 09:29 AM
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eyah...

he dropped the whole project -- decided to go a different route.

Last I heard
He scopped up 32 CHT 18" subwoofers at the CHT closeout sale and picked up four pyle 8 channel amps. Wonder how that would fair?


ewww...perish the thought






Seriously though - several months - no update?

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post #678 of 679 Old 07-18-2014, 10:25 AM
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I know he has been super busy with getting into the house and moving, etc in the past few weeks. All of the equipment is hanging out and I know he's planning to start building stuff soon with any luck.
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post #679 of 679 Old Yesterday, 11:07 AM
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did you guys ever do the comparison between the SI 24 and the JBL's to see if there was any difference in sound?
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