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Twin Towers BUILD LOG - Page 14

post #391 of 615
12/8/10 at 5:06am
Thread Starter 
Fringe: Amber 7Hz scene

http://www.youtube.com/watch?v=oLFss7Sg1FQ

http://www.youtube.com/watch?v=CrBthoyIcZc
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post #392 of 615
12/8/10 at 4:35pm
Thread Starter 
Slow Motion is full of subsonics

http://www.youtube.com/watch?v=VhRBdrx17x4
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post #393 of 615
12/9/10 at 7:08am
This is wild - thank for sharing!!
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post #394 of 615
12/9/10 at 7:58am
Thread Starter 
wish everyone could experience it. 5Hz-10Hz in this place is just out of this world. Watchin The Day The Earth Stood still right now, fun stuff!
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post #395 of 615
12/9/10 at 8:57am
Thread Starter 


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post #396 of 615
12/9/10 at 9:02am
Seeing this makes me want to drop the 15's out of my sono's and put some 18's in there.

The one thing that really stands out about this build, and still my favorite thing is "effortless" Bass and the fact that you don't have to worry about blowing anything up. (Though I agree and think you need to get some 12ga or larger wires and run then directly to your breaker for the amps on 20 amp circuits.)
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post #397 of 615
12/9/10 at 9:07am
Thread Starter 
Do it! IB3s are cheap, I initially ran mine in 21.5 cubic feet. It is effortless, its super efficient. When i watch the sine waves videos at low volume the subs barely even move from 5Hz on up yet it makes the house wobble. Then I pull up the tone generator and bring them full excurion

my camera sucks, trying to clean it with rubbing alcohol







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post #398 of 615
12/9/10 at 9:31am
Thread Starter 
9Hz. Best combination of pressurization and excitation. Speaks for itself.

http://www.youtube.com/watch?v=rIcNqrqn3J4

Every time I play this clip at low volume it still shakes me and the house. At low volume I get 5Hz. Imagine when I play the sinewave at full volume.

http://www.youtube.com/watch?v=k37f_cQNJuc

6Hz. I said lets let this thing cool off for a second: I meant the power strip as the breaker keeps going off. Amp and subs dont even get tickled with temp.

http://www.youtube.com/watch?v=JTn92tSUlk0

7Hz. http://www.youtube.com/watch?v=aWwcpYspUf8

8Hz. EP4000s lights show push-pull. The house gets highly presurized, the walls ceiling and floor make cracking sounds from expansion. clearly felt but inaudible.

http://www.youtube.com/watch?v=BiqpsO4qZnM

10Hz probably my most efficient frequency. This frequency causes all the air in the room to circulate, feels like a soft cool breeze.

http://www.youtube.com/watch?v=-ROsSOpiF_4

11Hz. powerful.

http://www.youtube.com/watch?v=uCMt8oW56yQ

12Hz powerful

http://www.youtube.com/watch?v=La7vgYHKc9k

13Hz tuning.

http://www.youtube.com/watch?v=Qi1yXPvxkyM

14Hz getting loud

http://www.youtube.com/watch?v=N0LLN-4y-U0

skipped a hurtz somewherez. gettn louder still.

http://www.youtube.com/watch?v=HQ1rwAQ6Tww

17Hz LOUD LOUD LOUD! Hurts my ears!

http://www.youtube.com/watch?v=yOUAxLmmqiY

18Hz. My favorite fequency. I would like to die from overexposure to 18Hz.

http://www.youtube.com/watch?v=ZuKBLKDgUfw

19Hz. real loud. How much is pure 19Hz and how much am i hearing harmonics?

http://www.youtube.com/watch?v=lPNAnnj7CVg

20Hz. the beginning of human audibility? depends on the SPL.

http://www.youtube.com/watch?v=frTZZanrpQ4

25Hz. :-O OOPS! (be nice with your comments :-)

http://www.youtube.com/watch?v=RasxflcO_3c

30Hz-45Hz everythings OK proceeding with caution and restraint. nah, jus caution to the wind.

http://www.youtube.com/watch?v=z4HcyC_Lx1c

5Hz is clearly present. 3 Hz is dead. 4Hz is right in between. I feel it but its hard to tell.

http://www.youtube.com/watch?v=bsFxMoHJQ3k

3Hz recording bandwidth bottom

http://www.youtube.com/watch?v=jH0sJOBrgRI
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post #399 of 615
12/9/10 at 10:44am
A few things;
I once heard a description somewhere, may have been over at the Cult, but it was a description of a clipping or cone over excursion that was described like a shot being fired. When you bottomed out at 25, that's exactly what I thought of, that comment describing a shot being fired. What was it? What hit what? Does the voice coil or former hit the backplate area?

Also, you're into signal path bandwidth limitations down in the single digits. The recording, your sound card, the Denon, and the amps,..all before the Fi 18s even get a chance to stroke.

Very interesting comments too, wrt the cool breeze feeling etc..

Thanks

Remind me again how your coils are wired. What is the coil rating, and how is everything con-figd.

Thanks
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post #400 of 615
12/9/10 at 11:29am
Thread Starter 
FOH, I am all too familiar with bottoming out drivers I have always been obsessed with the lows, but as I get further and further into this thing, it keeps getting lower and lower. I remember when i was obsessed with music that went down to 30Hz. Then it was 20Hz. 15Hz. I am at 5Hz and Id like to think Ill never get stupid and want 1-3Hz. 1/2 octave, 4X the displacement.

The former smashing into the bottom plate. The IB3s are tough, very tough. Aluminum. I initially had one 1B3 18 that I bottomed many times until it died, reconed it and it lasted a couple days because I had just gotten the EP4000s and really beat it up, then I got the two installed in the HT and an accident here, accident there over and over and they just kept on going. Then I got four for the van, accident here and accident there, never any issues. The van would still be fine, but because of my having more accidents in the beginning as I was getting to know the limits in that alignment, when i went to get TermLabed I didnt hold back. Every single frequency i brought up click by click until over excursion to get max SPL. I went into it knowing I would finish them off so that i could recone them and have fresh new cones with the knew knowledge of my limits. I ended up selling a pair of the blown subs, so I was going to recone the two HT 18s to replace those, and replace the HT subs with 22's. 22's got delayed yet again, never heard back from Nick at IA or Kevin at Exodus, and boy am I GLAD! So I purposely got carolous with the two in the towers to have some fun and bottom them to recone them.

So I reconed the four subs and they are in the towers, and 2 nights ago I ordered four more IB3 18's. So I will have a total of 8. BTW, the initial IB3 I had I used to test fit holes during the HT and van build, someone broke the motor on it in the process, otherwise Id have 9 IB3s.

When you bottom, you know. A tiny slight kiss isn't loud but clearly audible. But when you smack, it puts the fear of god into you. It is very loud, very frigtening.

You are very correct about electronics roll off, when I get to the single digits I have to really crank the receiver up. I do not need a HP filter, when I bottom out it is above tuning, not below. When I model them in WinISD I add two Linkwitz @ 10Hz to simulate rolloff.
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post #401 of 615
12/9/10 at 12:34pm
Thread Starter 
FOH, my coils are custom dual 4 ohm, so when i had just two in the twoers I was running series 8-ohms. Now I am running series/parallel 4 ohms
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post #402 of 615
12/9/10 at 12:45pm
Just Sick mate! They just get better and better.

Just some REW graphs now!

Graham
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post #403 of 615
12/9/10 at 2:50pm
Thread Starter 
Quote:
Originally Posted by gperkins1973 View Post

Just Sick mate! They just get better and better.

Just some REW graphs now!

Graham

bring me some hardware! I spent the rest of my audio budget 2 days ago on four more IB3s for the van!
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post #404 of 615
12/9/10 at 5:27pm
Thread Starter 
http://www.youtube.com/watch?v=MTMJ8aRaco0
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post #405 of 615
12/9/10 at 7:56pm
Thread Starter 
wasnt gonna make vids of all these movies means Im watchin 2 or 3 a day with all this fun, but even at low volume low excursion it caught my woman and I and I just hadda... even at 3 slightly diff angles I still hadda upload them all. meh.

http://www.youtube.com/watch?v=EWoYMdI4nGo

http://www.youtube.com/watch?v=E6Aovm9VVJU

http://www.youtube.com/watch?v=seeG1GQG-OM
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post #406 of 615
12/9/10 at 11:44pm
Thread Starter 
One

http://www.youtube.com/watch?v=O1mv0-39RtA

Billy Jean

http://www.youtube.com/watch?v=n8LnZyp9Tt4
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post #407 of 615
12/10/10 at 12:00am
With the mass spamming of these Youtube videos, one must wonder if you are trying to apply for revenue sharing and make money from Youtube.

On the other hand.... remaneo.
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post #408 of 615
12/10/10 at 12:31am
Thread Starter 
and remaneo I shall!
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post #409 of 615
12/10/10 at 2:08am
Slight thread jack here, but I can't help myself right now.... I'm super excited, my SSD18's have been featured on Car Audio And Electronics home page, and also in the featured picture gallery! Check it out at CAE Featured Picture. I also got news today that a number of shops in the Portland area are very interested in contracting me to design and build "stock boxes," as I like to call them, since SubZero is going out of business (no surprise there, such garbage engineering, if you ask me) and they will be looking for a new enclosure supplier.

Back to you, Bob! I have never been able to bottom out my SSD's once, no matter how hard I have pushed them, or how many watts I throw at them, but I am assuming that is due to the fact that there is much more suspension in my drivers (four spiders vs. one) to the SSD's than the IB line, correct? I know the enclosure airspace and motor force differences also plays a large part in this as well, but were you able to bottom out the IB's, even in the smaller box I have seen you run?
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post #410 of 615
12/10/10 at 6:51am
krytonite,

This is awesome. A Question: Going from the ultra low frequencies and stepping up. At what frequency does the ouptut transition from feeling the output to actually hearing it.

I know everyone's ears will be different, but just curios as to how low you are actually hearing the signal?
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post #411 of 615
12/10/10 at 10:28am
Thread Starter 
Quote:
Originally Posted by s_carter View Post

Slight thread jack here, but I can't help myself right now.... I'm super excited, my SSD18's have been featured on Car Audio And Electronics home page, and also in the featured picture gallery! Check it out at CAE Featured Picture. I also got news today that a number of shops in the Portland area are very interested in contracting me to design and build "stock boxes," as I like to call them, since SubZero is going out of business (no surprise there, such garbage engineering, if you ask me) and they will be looking for a new enclosure supplier.

Back to you, Bob! I have never been able to bottom out my SSD's once, no matter how hard I have pushed them, or how many watts I throw at them, but I am assuming that is due to the fact that there is much more suspension in my drivers (four spiders vs. one) to the SSD's than the IB line, correct? I know the enclosure airspace and motor force differences also plays a large part in this as well, but were you able to bottom out the IB's, even in the smaller box I have seen you run?

cherry!
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post #412 of 615
12/10/10 at 10:30am
Thread Starter 
Quote:
Originally Posted by cuzed2 View Post

krytonite,

This is awesome. A Question: Going from the ultra low frequencies and stepping up. At what frequency does the ouptut transition from feeling the output to actually hearing it.

I know everyone's ears will be different, but just curios as to how low you are actually hearing the signal?

thats a touch question, as I play 1Hz increments full bore to see that all the time. There's no clear "I can't hear it with this one. Oop, I hear this one" as it kind of shifts, blends. This one is dead, this one is different but I dont now how, this one seems like I can hear it until I hear this one then I think i really didnt hear the other one. It is odd.
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post #413 of 615
12/10/10 at 12:19pm
Quote:
Originally Posted by cuzed2 View Post

krytonite,

This is awesome. A Question: Going from the ultra low frequencies and stepping up. At what frequency does the ouptut transition from feeling the output to actually hearing it.

I know everyone's ears will be different, but just curios as to how low you are actually hearing the signal?

That occurs at about 15hz for me. That's with a lot of clean level I can just sort of hear something, an air modulation effect. You feel it well before that level. Any lower and its all feeling.
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post #414 of 615
12/10/10 at 12:25pm
Thread Starter 
Quote:
Originally Posted by Ricci View Post

That occurs at about 15hz for me. That's with a lot of clean level I can just sort of hear something, an air modulation effect. You feel it well before that level. Any lower and its all feeling.

Thats with the four XXXs sealed?
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post #415 of 615
12/10/10 at 12:37pm
Any of about 4 different systems.
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post #416 of 615
12/10/10 at 12:57pm
Thread Starter 
so the four XXXs, your single ported XX, the DTS-10, and?
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post #417 of 615
12/10/10 at 1:00pm
More or less any design that can play fairly loud (> 90dB) @ 15Hz can be heard. Hearing something at 15Hz does not require a special design. Its an easy test with REW. I got down to 15hz and that was it. 14Hz is just pressure and wind from the sub.
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post #418 of 615
12/10/10 at 1:07pm
Quote:
Originally Posted by kryptonitewhite View Post

so the four XXXs, your single ported XX, the DTS-10, and?

Sealed car system, had dual sdx15's plus an lms all sealed in my bedroom for awhile. Etc...
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post #419 of 615
12/12/10 at 10:31pm
Thread Starter 
Why do the fans on the EP4000s slow down when under a heavy load, then after the load is stopped they kick into high gear? During a bass heavy scene they all but stop, after it's over they reve up. I just played a 5Hz sine again and the fans went dead, I played for about 15 seconds, and as soon as I stopped they kicked into high gear then slowly went down as they "cooled" though they never ever get hot. What I do like is how sensitive they are, just a little bass and the sensor picks up on it.

When i played this THX 3 times to make these, the subs moved one of my EPs... sure most of you know how heavy and unslideable they are.



http://www.youtube.com/watch?v=ceRNqFDmQjk

http://www.youtube.com/watch?v=kG4YtIrC3vs

http://www.youtube.com/watch?v=oF2m7YCFbsQ
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post #420 of 615
12/13/10 at 1:58am
Jordan,

That is wierd cos when I had the stock fans it they would speed up when more power was being drawn. They should run slower with less power drawn.

It is purely down to the amount off power you are drawing from the mains but then surely the amps would cut out.

Roll on the new behringer amps! Two off the new 6000 model would rock in your room.

cheers

Graham
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