Your Home Theater ULF Score - Page 78 - AVS Forum | Home Theater Discussions And Reviews

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post #2311 of 4726 Old 09-02-2014, 11:21 AM - Thread Starter
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Quote:
Originally Posted by MKtheater View Post
Dom,
So I finished up the back subs in sealed mode to test the response. I have a driver on opposite sides, facing forward and side ways. I wired them for each sub to be an 8 ohm load and then I connected both subs to my clone amp for a nominal 4 ohm load. Disconnected the front wall. I played bass I love you for testing purposes and WTF! Just in sealed mode the whole back riser, moldings, back speakers, and body starting moving! I don't know what the response was but my 4 sealed drivers felt more powerful than anything before. These are literally less than a foot away from me in all directions. In sealed mode it only adds 4 SI across the board but the location and platform felt more powerful than the 12 SI's I had before, it was stupid crazy! The 7 hz tone made my shirt wiggle and the upstairs was wobbling from it. The surround speakers have to be reinforced!
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Originally Posted by popalock View Post
Ahhh nearfield bliss... I miss it dearly...

Sometimes, during spirited listening sessions, I would trip my breaker from pushing my front subs so hard. On occasion, it would take me a minute (or a certain part of a song) before I could tell my front stage was off because the nearfield were giving me soooo much feedback.

Whole notha level...
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Originally Posted by MKtheater View Post
My 4 subs in the back are using the riser as the enclosure so I am literally sitting on the subs. The bottom of the subs don't have a panel, they are drilled right into the riser as the panel. It adds a whole new level of feel. It is so powerful feeling the guys told me to not even bother with any in the front. Of course I won't listen.
Awesome stuff mk! I must say that it is not surprising at all for those of us that run nearfield subs.

If you recall, I ran a test between the tactile feedback from subs that were 3 ft away vs 13ft away in post4 of this thread. To get the same amount of tactile feedback as the nearfield subs, I had to increase the volume of the subs 13ft away by 20db!

Sounds like your room is similar...
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post #2312 of 4726 Old 09-02-2014, 11:27 AM
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Yes, I don't think my front array of 12 SI's could even get to shake me from the 4! I will try though!
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post #2313 of 4726 Old 09-02-2014, 12:23 PM
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Originally Posted by dominguez1 View Post
Hey pop, you had created a sub journey thread before...could you post the link? Time for my update.
Nice path!

I used to run the same mains and center... I really miss those mains

 


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post #2314 of 4726 Old 09-02-2014, 12:24 PM
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Looks a lot better with the AT screen. How deep is the space behind your screen and what is the screen size before / after?
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Originally Posted by dominguez1 View Post
Thought I'd throw this together...

My ULF Journey (Focus on ULF Stars row and below):

I ended up going with an AT screen, so my FTW21s are now hidden.

My home theater
Speakers: 3 JTR 212HTR (LCR), 2 Jtr Single 8LP (S), 2 JTR Triple 12LF (SB)) , 4 Volt 10LX (Atmos)
Subwoofers: 4 Rythmik FV15HP , 5 Crowson Shadow 8 transducers, 3 Buttkicker LFE
Display: JVC RS400
FS: 4xRythmik FV15HP
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post #2315 of 4726 Old 09-02-2014, 12:49 PM
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Originally Posted by dominguez1 View Post
Bassthathz, you really considering Ghorns? Do it! Ghorns Nearfield FTW! Actually, better yet, create a couple of riser horns for both of your rows!
Here is 40 horned 15's with 40,000watts.
(I'm not even sure if that was full blast.)

What ULF score is that?
I don't think any of us has topped this... yet!
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post #2316 of 4726 Old 09-02-2014, 01:51 PM
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Originally Posted by BassThatHz View Post
Here is 40 horned 15's with 40,000watts.
http://www.youtube.com/watch?v=DdzU3dph0s8
(I'm not even sure if that was full blast.)

What ULF score is that?
I don't think any of us has topped this... yet!

It does not fit into rooms so the room size is too big for a great ULF score.
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post #2317 of 4726 Old 09-02-2014, 01:52 PM
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Here is the other one


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post #2318 of 4726 Old 09-02-2014, 03:15 PM
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Here you go Shawn...
This is temporary, I'm waiting for my daughters phone for better quality.
I found a very old camera so the quality is terrible...so sorry.
I feel like I'm trying to avoid this video and AM NOT!!!
I need a better quality camera



Dom, this video is a quick view of my HT Room...not finished yet of course.
Don't know when it'll be finished
Working on the panels in which you can see some in this video
Again...my apologies for the quality

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My Build Thread
Equipment Speakers:
3x 1099's for LCR duty
4x Fusion 8's for surround duty
8x subs: 4x FTW21's and 4x SI18's
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post #2319 of 4726 Old 09-02-2014, 03:23 PM
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Quote:
Originally Posted by Fatshaft View Post
Here you go Shawn...
This is temporary, I'm waiting for my daughters phone for better quality.
I found a very old camera so the quality is terrible...so sorry.
I feel like I'm trying to avoid this video and AM NOT!!!
I need a better quality camera



Dom, this video is a quick view of my HT Room...not finished yet of course.
Don't know when it'll be finished
Working on the panels in which you can see some in this video
Again...my apologies for the quality

That is a nice response! What are your subs?

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post #2320 of 4726 Old 09-02-2014, 03:27 PM
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Quote:
Originally Posted by MKtheater View Post
It does not fit into rooms so the room size is too big for a great ULF score.
480 15's
480,000watts


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post #2321 of 4726 Old 09-02-2014, 03:35 PM
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Challenge accepted.

Better tear down your current theater, BdatHz. Be the pioneer for this bass suicide, erm awesome system.
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post #2322 of 4726 Old 09-02-2014, 03:40 PM
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I was thinking of porting my sealed setup but what is the point? I already don't use all of what I have, just building a better box to driver enclosure for better low end sensitivity like an IB should have.
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post #2323 of 4726 Old 09-02-2014, 04:19 PM
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Originally Posted by Fatshaft View Post
I think this is a AVS Guinness record: The very first A/V related "video or it never happened" response.

Additionally... you might be the very first avs'er to actually PROVE a subwoofer performance sweep / REW chart via an online video. (Nobody else has taken the effort or courage, those slackers! )

Correct me if I'm wrong, but I don't think anybody has ever posted their subwoofer response in real-time video on AVS before.

This is the "first sign" that I've seen that society is starting to reach "web 1.5" technological abilities, this is an important milestone.
As I've said many times already, pictures are so.... 90's dial-up







Anyways, enough about web-technology progression...
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post #2324 of 4726 Old 09-02-2014, 05:48 PM - Thread Starter
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Quote:
Originally Posted by Spanglo View Post
Nice path!

I used to run the same mains and center... I really miss those mains
Thanks!

It was really interesting going back and looking at my upgrade path from a ULF score perspective. I remember when I first got into this hobby about 4 years ago when I purchased the eD A2-300.

It was absolutely awesome....based on my listening preference (-18db was the loudest I listened at the time...), I thought I was in bass nirvana! I had a 2.5 Star ULF system and was very happy! So, I can definitely relate to those that are satisfied with their entry level HT sub.

Ignorance is bliss.

I love my Klipsch speakers. They are incredibly dynamic and great for movies and rock concert level sound! When I want to dial it back and listen to some jazz, classical, etc. that's where the maggies excel...and where the flat curve comes in for my critical listening. My HT curve has the bass jacked pretty good.

Why did you get rid of your Klipsch's?
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post #2325 of 4726 Old 09-02-2014, 05:52 PM - Thread Starter
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Quote:
Originally Posted by ahmedreda View Post
Looks a lot better with the AT screen. How deep is the space behind your screen and what is the screen size before / after?
Thanks...I agree. It really changed it from a media room, to a theater IMO.

I've got around 28in from the frame to the wall.
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post #2326 of 4726 Old 09-02-2014, 05:54 PM
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Thanks...I agree. It really changed it from a media room, to a theater IMO.
Proper.

If you want the full cinema experience, go AT.
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post #2327 of 4726 Old 09-02-2014, 06:08 PM - Thread Starter
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@Fatshaft

Nice HT! Your subs look pretty menacing in the back!

I still can't get over your FR...crazy.

@BassThatHz

You are crazy sir...I get first demo of the 12 matterhorns...
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post #2328 of 4726 Old 09-02-2014, 06:24 PM - Thread Starter
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Originally Posted by MKtheater View Post
I was thinking of porting my sealed setup but what is the point? I already don't use all of what I have, just building a better box to driver enclosure for better low end sensitivity like an IB should have.
You may not have to. What does your response look like nearfield?

Do you want to see if you have a ULF resonant frequency in your riser or couch?

You can use the Vibration Meter to take measurements and plot them against different frequencies. I did this with mine, and that's how I determined my HT seating gets energized between 10hz and 20hz.

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post #2329 of 4726 Old 09-02-2014, 06:46 PM
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I am not there yet.
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post #2330 of 4726 Old 09-02-2014, 11:14 PM
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Quote:
Originally Posted by BassThatHz View Post
Here is 40 horned 15's with 40,000watts.
http://www.youtube.com/watch?v=DdzU3dph0s8
(I'm not even sure if that was full blast.)

What ULF score is that?
I don't think any of us has topped this... yet!
Ivan won't give up the design... I'm sure Danley would for a price, but I haven't begun to explore that avenue. Hummm, it was initially designed for the military, so maybe they won't give up the design? Ha!

Quote:
Originally Posted by MKtheater View Post
It does not fit into rooms so the room size is too big for a great ULF score.
Anything can be done if you start from scratch.
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post #2331 of 4726 Old 09-03-2014, 11:39 AM
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Quote:
Originally Posted by dominguez1 View Post
Thanks!

It was really interesting going back and looking at my upgrade path from a ULF score perspective. I remember when I first got into this hobby about 4 years ago when I purchased the eD A2-300.

It was absolutely awesome....based on my listening preference (-18db was the loudest I listened at the time...), I thought I was in bass nirvana! I had a 2.5 Star ULF system and was very happy! So, I can definitely relate to those that are satisfied with their entry level HT sub.

Ignorance is bliss.

I love my Klipsch speakers. They are incredibly dynamic and great for movies and rock concert level sound! When I want to dial it back and listen to some jazz, classical, etc. that's where the maggies excel...and where the flat curve comes in for my critical listening. My HT curve has the bass jacked pretty good.

Why did you get rid of your Klipsch's?
Yes agreed, ignorance is bliss. I used to judge the worth of my early bass configurations strictly by how much bass they put out, not giving a single thought to how it sounded.

I sold the KG 5.5 and KLF-C7 to a friend of mine, but only after he promised to offer them back to me should he ever want to get rid of them. I sold the speakers because I went with a larger projector screen and needed small speakers to fit under the screen. Unfortunately, I couldn't accommodate an AT screen in my room, so it was either keep the KG's with a small screen, or go with a big screen and smaller speakers.

I was running a KV3 center, but then I wanted a lower screen height, so now I run phantom center with Crites CS-1 mains and 4 subs (4 star system). Good times.

 


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post #2332 of 4726 Old 09-03-2014, 12:26 PM
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Originally Posted by popalock View Post
Ivan won't give up the design... I'm sure Danley would for a price, but I haven't begun to explore that avenue. Hummm, it was initially designed for the military, so maybe they won't give up the design? Ha!

Anything can be done if you start from scratch.
They have a build-video which pretty much gives it away, basically 40 ICE 1000's powered by a big gennie and 40 15's (MTX 9500 / TC 15)
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post #2333 of 4726 Old 09-03-2014, 12:30 PM
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Originally Posted by BassThatHz View Post
They have a build-video which pretty much gives it away, basically 40 ICE 1000's powered by a big gennie and 40 15's (MTX 9500 / TC 15)
http://www.youtube.com/watch?v=o36Kp6veJ6c
Sooo much more going on in that design than what the build shows...
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post #2334 of 4726 Old 09-03-2014, 12:30 PM
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A 15" driver horn loaded x40. Not really all that hard to design. Just tough to build. Big and expensive.
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post #2335 of 4726 Old 09-03-2014, 09:47 PM
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Originally Posted by Scott Simonian View Post
A 15" driver horn loaded x40. Not really all that hard to design. Just tough to build. Big and expensive.
Guess we know who to turn too now for help.


I've always had a few questions about the Matterhorn. Why the need for 40 individual amps vs. getting a few powerhouse amps drive multiple subs to save space and money? What kind of DSP work would go into the design to get it dialed in? I mean 40 drivers, each vertical row has a different distance from the horn mouth, so it seems like it would be a very tedious task to dial everything in properly. Maybe I'm just over thinking it and with a little time and patience anything can be done. It would be nice if @Ivan Beaver chimed in to provide just a glimpse of the secret sauce in the Matterhorn design.

I've seen some very great input from @Ricci about using multiple drivers in a tapped horn, but can't find the post...
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post #2336 of 4726 Old 09-03-2014, 11:51 PM
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Hey Pop,
Do you have any response graphs from your near field vs far field subs? Raw ones?
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post #2337 of 4726 Old 09-04-2014, 01:05 AM
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Originally Posted by MKtheater View Post
Hey Pop,
Do you have any response graphs from your near field vs far field subs? Raw ones?
Son of a....

Embarrasingly enough, no...I don't have the raw response graphs of near vs. far field. I have the raw response of just my front here. I have an "after" EQ response of just my fronts, then all combined, then inverting my nearfield here.

Clearly not what you asked for, but that's all I got for ya at the moment. FYI. The internal volume of my boxes (front and rear) yeiled approximately 3.9ft^3 for each driver.

Yeah, I guess I was so excited to start tweaking with my mini that I blatantly overlooked capturing the raw response of my far vs near field.

Won't happen again.
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post #2338 of 4726 Old 09-04-2014, 07:44 AM
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It does not matter, any response is good. I was curious on how much boost you needed to bring up the low end of each.
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post #2339 of 4726 Old 09-04-2014, 08:07 AM
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BTW,
I still can't open the new ULF calculator.
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post #2340 of 4726 Old 09-04-2014, 08:16 AM
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Quote:
Originally Posted by MKtheater View Post
It does not matter, any response is good. I was curious on how much boost you needed to bring up the low end of each.
More boost was needed than what I was expecting. Guess I was just jaded from the awesome motor tech of the LMS-U.

However, I was eventually able to get the redline as my ULFTard curve with a bit of miniDSP tweaking.





Don't be disappointed in their low end response right off the bat, because it does take a bit of work...
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