Your Home Theater ULF Score - Page 145 - AVS Forum | Home Theater Discussions And Reviews
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post #4321 of 4632 Unread 04-22-2016, 02:55 PM
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Quote:
Originally Posted by Brian Fineberg View Post
Thank you!!!!
We have similar cards, just that my room is a bit smaller.
And pretty much the same subs, minus the PSA
But I have UM-18s and you have DS4s

But I do have 4 1262s that are sitting in boxes still...

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Surround Speakers : HTD Level 3 Towers/RBH R5Bi Front and Rear Heights
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Born in 1995 and still continuing my HT journey

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post #4322 of 4632 Unread 04-22-2016, 03:07 PM
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Quote:
Originally Posted by bgtighe23 View Post
We have similar cards, just that my room is a bit smaller.
And pretty much the same subs, minus the PSA
But I have UM-18s and you have DS4s

But I do have 4 1262s that are sitting in boxes still...
Get to work on those, man!

Young guy.... not doing too bad at your age. I think when I was 20-ish I still was rocking a single vented Adire Tempest.

Time to wrap up the 1262's so you can move on up the ladder here.
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post #4323 of 4632 Unread 04-22-2016, 04:54 PM
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Originally Posted by Scott Simonian View Post
Get to work on those, man!

Young guy.... not doing too bad at your age. I think when I was 20-ish I still was rocking a single vented Adire Tempest.

Time to wrap up the 1262's so you can move on up the ladder here.
Thanks.

The issue with the 1262s is I will need to start getting dedicated circuits...but I don't believe this will be the permanent HT room so I don't want to invest too much into those things.
But trust me, climbing up the ladder is something I very much so plan to do and I hope it's with more 18s and not 1262s

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Subwooferage : Dual UM-18s/6 SI HT18s
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post #4324 of 4632 Unread 04-22-2016, 10:03 PM
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I so envy you people with sealed dedicated small rooms. That's it, we need a non-ulf scorecard for us big, open-room, concrete floor having people
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post #4325 of 4632 Unread 04-26-2016, 11:11 AM
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Originally Posted by dominguez1 View Post
^^^This


^^^Using this conversion


^^^Equals your the new and improved ULF Card with Tactile Response metrics

Nice work...
I don't see a 5hz rating - should there be one?
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post #4326 of 4632 Unread 04-26-2016, 11:16 AM
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Originally Posted by coolrda View Post
The things I do for my fellow AVSers.

Curious about this ULF card. All of the other cards I see on the first page with 5hz readings have the score higher (worse) the lower you go in hz. On Brian's card his 5hz score is 2.5 times better than his 10hz score. That doesn't make sense to me. Is that accurate?
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post #4327 of 4632 Unread 04-26-2016, 11:23 AM - Thread Starter
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Originally Posted by raynist View Post
I don't see a 5hz rating - should there be one?
Sorry, are you already in the 5hz club?
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post #4328 of 4632 Unread 04-26-2016, 11:24 AM - Thread Starter
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Quote:
Originally Posted by raynist View Post
Curious about this ULF card. All of the other cards I see on the first page with 5hz readings have the score higher (worse) the lower you go in hz. On Brian's card his 5hz score is 2.5 times better than his 10hz score. That doesn't make sense to me. Is that accurate?
No, you are correct. They should be the same for a sealed setup.

@coolrda may have fat fingered...
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post #4329 of 4632 Unread 04-26-2016, 11:33 AM
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Originally Posted by dominguez1 View Post
Sorry, are you already in the 5hz club?
Not sure - I think you created the card for me and I bought maybe there wasn't a good 5hz rating to you left it off.
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post #4330 of 4632 Unread 04-26-2016, 11:33 AM
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Originally Posted by dominguez1 View Post
No, you are correct. They should be the same for a sealed setup.

@coolrda may have fat fingered...
Good catch Raynist. Not my fault man. I defer to Mr Fineberg. I used the card posted on post 4300. It does indeed have a different 5hz than the smaller card a few posts proceeding. I'll see if the smaller card is workable.
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post #4331 of 4632 Unread 04-26-2016, 11:49 AM
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Quote:
Originally Posted by Brian Fineberg View Post
new card...why is it so little?
This isn't a viable sample. Needs a name on it. Jeez, why does this feel like I'm splicing genes ?
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post #4332 of 4632 Unread 04-26-2016, 11:53 AM - Thread Starter
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Originally Posted by raynist View Post
Not sure - I think you created the card for me and I bought maybe there wasn't a good 5hz rating to you left it off.
Can you post your FR to 5hz? That will get you in...
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post #4333 of 4632 Unread 04-26-2016, 12:01 PM
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Originally Posted by dominguez1 View Post
Can you post your FR to 5hz? That will get you in...
Sure.

What db level do we need it at? I can probably do it this weekend.
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post #4334 of 4632 Unread 04-26-2016, 02:19 PM - Thread Starter
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Originally Posted by raynist View Post
Sure.

What db level do we need it at? I can probably do it this weekend.
With your setup? 125db sweep

A 75-80db sweep will be fine. Your score will dictate your max output levels, so don't need to push your system...of course you can if you'd like!
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post #4335 of 4632 Unread 04-26-2016, 05:54 PM
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Originally Posted by dominguez1 View Post
With your setup? 125db sweep

A 75-80db sweep will be fine. Your score will dictate your max output levels, so don't need to push your system...of course you can if you'd like!
We should all be doing this. Short mono sine sweep w/5db spacing until comp sets in.
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post #4336 of 4632 Unread 04-26-2016, 07:04 PM
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Quote:
Originally Posted by raynist View Post
Curious about this ULF card. All of the other cards I see on the first page with 5hz readings have the score higher (worse) the lower you go in hz. On Brian's card his 5hz score is 2.5 times better than his 10hz score. That doesn't make sense to me. Is that accurate?
I read that there was a GTG in PA. I think it was at your house. One guy came away and was blown away literally and figuratively, lol. He left think that he has to re- look at his entire bass system.
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post #4337 of 4632 Unread 04-26-2016, 07:11 PM
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Originally Posted by coolrda View Post
We should all be doing this. Short mono sine sweep w/5db spacing until comp sets in.
That won't work. The loudest systems on the ULF Score chart exceed the dynamic abilities of what a UMIK-1 can handle in-room.

There are only a few mics that can record over 130db and not sound like distorted farts, and I don't have any... but I do have a TermLab rated for over 180db

For example here is my HzHorn. The sub isn't compressing (but the UMIK-1 is. )

That's only 1 sub... what if I activated all of my subs?

There is a reason why data-bass uses a $2000 mic and measures at 10m, rather than 1m. It is to keep the THD of the mic low enough for capturing 140db+, you want to measure the subs THD not the mics THD
data-bass also has a huge open field with a zillion-amp breaker. How many users have access to something like that to avoid room-modes (not many...)

All it takes to clip a UMIK-1 is one 21" with 300watts nearfield.
Now imagine the SPL at the full-output of a FP14000 with multiple nearfields!!!

Besides... I'm sure data-bass has smoked many drivers making compression-charts with a 10 or 20kW amp into a single coil. Kind of risky...
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post #4338 of 4632 Unread 05-02-2016, 07:27 PM - Thread Starter
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Below is an earlier picture of the area behind my sofa back when I was planning to build DIY subs instead of going ID. The large cardboard boxes along the back wall on either side of the main LP are placeholders for two of the four JTR Cap 1400's that were on order. Both rear Cap 1400's are now placed sideways with their driver/port facing the center position. Each one is about 4 feet from the LP in the center. The other Cap 1400's are at the front of the room with my main speakers.

The rear sofa table has a opening below that's currently housing my two old Energy ESW 150 subs. This is where I want to build a near field sub for tactile response as I'm on a concrete floor in a huge 10,000 cf room. The 18 x 48 x 16 space under the existing sofa table would accommodate a 6.1 cu ft internal volume enclosure. it could be painted in black and relatively east to build.

I could also replace the existing sofa table with a larger enclosure at 24 x 54 x 18 with 10.3 cu ft internal volume. It would need to be finished in Qtr Teak to match other furniture and would require the use of a woodworker I know to build and finish.

Lastly, the opening in the rear sofa table could also accommodate a Captivator S2 if I cut out the bottom shelf if I didn't want to go DIY. But that would be a lot more money, so I am in the process of getting two UXL-18 drivers for my near field subwoofer.



You're suggesting that ported near field subs have more tactile response than sealed. Which of the SEALED/PORTED options below will give me the best response in combination with the two Cap 1400's that are already there?

SEALED

I already have two cap 1400's on the rear wall to either side of the main LP, each one is about 4-5 feet away from the center position. Sealed UXL-18's in the rear center wall about 2 ft behind the LP might help bring up the ULF tactile response below the cap's 17 Hz port tune.

PORTED

I can put the UXL's in two DIY Sound Group Stonehenge enclosures centered 2 ft behind the LP. This might have more tactile response although their higher port tune at 22 Hz might create problems with the Cap's tune at 17 Hz




MOVED FROM JTR CAP 118 THREAD

If it were me...based on my experiences...

Output is not an issue for you with the 4 Cap1400s. Check the box on output.

Sounds like what you're wanting is extension, by way of a sub placed nearfield. IMO, sealed 2ft away probably won't get you the TR you're looking for from a 15hz and below perspective. I've read that nearfield sealed are very effective, especially when the driver is almost touching your HT seating. 2ft may not sound like a lot, but I do think that matters quite a bit for sealed designs.

Given that, the sub that I would select would be a low tuned, ported design. That pretty much limits you to two subs commercially available: Cap4000ULF and the FV15HP

Sounds like the CapULF doesn't meet your size requirements, but I believe 2 FV15HPs do (18x24x24) fit. Additionally, Rythmik is coming out with the FV25 in the late summer, and should rival the CapULF from 20hz to 12hz, and then the CapULF will pull away below that. The advantage with the Rythmik is that it is a much smaller footprint compare to the CapULF...likely the size that you're looking for.

Of course, I say all of this without have a good idea what happens to TR in a huge space like yours...but there's only one way to find out.

Do you get a lot of TR from your Cap1400s now?
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post #4339 of 4632 Unread 05-06-2016, 09:33 PM
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Hey guys, been on vacation and finally got pics. My panels are all DIY using denim and Ecose. The fabric is from ATS. The bass traps are 6 inches thick and the walls are all 4 inches. The ceiling are 2 inches. All of them are open back leaving a space to trap on both sides. My system is all behringer including the amps. Marantz processor running the show. What you can't see are the back subs which each bank of 215s and bass traps are sitting on. They are dual ported 18s. Actually all subs are the same, dual SI 18HT with dual ports.









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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 #4340 of 4632 Unread 05-06-2016, 11:13 PM
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Very nice MK. I like the all cinema style speakers. I can see you put a lot of work into the room, kudos!!!
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post #4341 of 4632 Unread 05-07-2016, 07:37 AM
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Thanks! I can't just change one thing, I changed everything!
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post #4342 of 4632 Unread 05-07-2016, 09:20 AM
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The B series sure make good sound.
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post #4343 of 4632 Unread 05-07-2016, 09:39 AM
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Yes they do. They are much better than the JBL pro 825's I owned as well.
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post #4344 of 4632 Unread 05-07-2016, 09:43 AM
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^ Time for an avatar update ^
Make it spiffy

love the space btw.

_____ _____ _____ _____ _____ _____ _____ _____ _____ _____ _____
Receiver : Denon x5200
Front Stage : Martin Logan Motion 60XTs/Elac Debut F5 Center
Surround Speakers : HTD Level 3 Towers/RBH R5Bi Front and Rear Heights
Subwooferage : Dual UM-18s/6 SI HT18s
Born in 1995 and still continuing my HT journey
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post #4345 of 4632 Unread 05-07-2016, 11:29 AM
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It always looks better in person and thanks. I think it is the first pic of the berry room
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post #4346 of 4632 Unread 05-08-2016, 07:21 AM - Thread Starter
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It always looks better in person and thanks. I think it is the first pic of the berry room
Nice MK! The berry's look great...and you did Atmos with them!

So those are 215s all around?

I've got to get over there and check it out again...major improvements since I last visited. Perhaps June again...need to check schedule.

Can I request that you upgrade to a 4K projector by the time i get there?
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post #4347 of 4632 Unread 05-08-2016, 08:43 AM
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I am using the LG LED projector, I love it! 4K will be in my future! I have 215s all around and 212s as ceilings. The 15s were just too big and even the kids would hit their heads walking under them. The room sounds much better now and the bass is crazy! I have 3 settings on the bass amps, flat, then one click for my normal, and one more click makes it nuts.
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post #4348 of 4632 Unread 05-08-2016, 09:41 AM
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^^^
Seat-gripping bass!


I've worn out 3 chairs myself thus-far: 1 cloth and 2 real-leather... You aren't an audio black-belt until the black-belt turns white from ACTUAL usage!
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post #4349 of 4632 Unread 05-08-2016, 10:00 AM
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That would be kid hands. I can't keep them clean! Those seats are the only original equipment left.
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post #4350 of 4632 Unread 05-08-2016, 11:07 PM
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That guy kinda looks like popalock
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