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Thread: DIY Sub Design |
    
Gold Member Username: Arande2
Rattle your ...
Missouri
Post Number: 2502
Registered: Dec-06
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| Posted on Friday, June 01, 2007 - 09:56 pm: |
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Ok. So far I've come up with this response graph (EBS).
Hope you can read it, or at least see the gist of it.
Design Goals: Deep Extension, Good SPL and SQ and much more
So far: Solid 10hz Extension, 117dB 10hz, 120dB 20hz, 123dB 30hz with 1200w+/driver.
Max SPL by Xmax limitations - 11hz 130dB 15kw/driver (WOW, RUMBLE RUMBLE haha) , 20hz 120dB 1200w/driver , 30hz 125dB 2200w/driver
When I get this done, I hope I can have an awesome movie/music experience after completion. I still have store credit to use too. I'll be DIY'ing my mains.
Note: Design subject to change |
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Gold Member Username: Nuck
Post Number: 7482
Registered: Dec-04
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| Posted on Saturday, June 02, 2007 - 10:40 am: |
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Note: so is my response. |
Gold Member Username: Arande2
Rattle your ...
Missouri
Post Number: 2504
Registered: Dec-06
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| Posted on Saturday, June 02, 2007 - 10:57 am: |
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Well everyone at Avs seems to like the idea of EBS for its SQ and SPL characteristics. The box total volume will be a bit large for the woofers though (50ft³ total), but it's worth it. It's more than worth it. |
Bronze Member Username: Leonski
Post Number: 95
Registered: Jan-07
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| Posted on Saturday, June 02, 2007 - 05:08 pm: |
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When you get this done, Please put your TT on top and turn it up.
"too much is never enough:" |
Silver Member Username: Ccdoggy
Post Number: 131
Registered: Jul-06
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| Posted on Sunday, June 03, 2007 - 03:06 am: |
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when i was building my EBS (12cuft, tuned to 13hz, FI Q 15" driver) i was told to smooth out the hump that appears due to tuning. I guess that because of reflections in you're room the lower end sound with actually increase dramatically. thus with that much of a peak down there it will get really really loud at that point compared to the rest of the sound.
If i were you i would head over to AVS or http://www.hometheatershack.com/forums/diy-subwoofers/ and clear it with them. they really do know what they are doing. |
Gold Member Username: Arande2
Rattle your ...
Missouri
Post Number: 2511
Registered: Dec-06
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| Posted on Sunday, June 03, 2007 - 03:55 am: |
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Naw I've been talking to the people at AVS for quite a while now. Thanks though. 
I've read up on this for quite a while now. 
I made sure to keep PPO
(my own little acronym haha) resonance >190hz, EBS slope 1.5, cone excursion peak 70-80% in ultra-port range, and aaaaalllllllllllllllll those other little things (like port outlet, enclosure bracing/building technique, etc. etc. goes on and on) . Haha don't worry.
Oh yeah, mine'll be similar, but I guess I forgot to tell you it's 2 Q18D1 drivers 50ft³ 11hz tune on an EP2500 for the proposed design. I've got plenty of time before actual materials bought and construction begun.
Yes, that's definitely true. You ALREADY have the room gain in effect and when you have a peak down low along with that it's like KABOOM...your pictures have been blown off the wall or there's a local earthquake! 
Yeah, I'm starting to get tired. Haha Leo...ok...yeah...um... |
Gold Member Username: Arande2
Rattle your ...
Missouri
Post Number: 2529
Registered: Dec-06
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| Posted on Saturday, June 09, 2007 - 04:13 pm: |
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I'm starting to get worried about my house...
People with subs not as powerful say it sounds like their house is breathing at full 10hz output. Scary. Someone even cracked their window..with a setup similar to the one proposed.
Movies and music shall become fun? QUITE! |
Silver Member Username: Leonski
Post Number: 158
Registered: Jan-07
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| Posted on Thursday, August 02, 2007 - 06:18 pm: |
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Don't you know you can DAMAGE yourself with VLF sound? You can turn your insides into jelly, damage cartlidge and ruin your hearing.
Ask a pro, but what is lowest frequency of any musical note?
What is the lowest frequency of any 'effect'?
50ft3 is an enclosure of 4x4x3 (48ft3) not counting wall thickness and need for several ft3 of bracing, brining external vol to 55ft3, at least. Will it double as a closet? |
Gold Member Username: Arande2
Rattle your ...
Missouri
Post Number: 2568
Registered: Dec-06
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| Posted on Thursday, September 06, 2007 - 01:45 am: |
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Even if they're rhetorical questions I'll still answer... Muahahahah!
Oooh did not know. But...I can be sensible and only use it as headroom (War of the Worlds)...dynamics are GREAT.
23hz (foundation)
a few hertz, or as low as you want.
No, it won't.
I should probably lower the overall size to more like 4x3.5x3 or so because the extra volume isn't really needed so much.
Muahahahahahha I like answering questions
IN OTHER NEWS...this won't be getting built for a while. In a week or two I'll be picking up a Pioneer Elite Vsx-91txh receiver and then I'll start the big DIY project.
Thank you for the info, seriously. |
Silver Member Username: Gavdawg
Upstate,
New York
Post Number: 878
Registered: Nov-06
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| Posted on Thursday, September 06, 2007 - 02:07 pm: |
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as much as things change.....
more they stay the same. |
Gold Member Username: Nuck
Post Number: 8562
Registered: Dec-04
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| Posted on Thursday, September 06, 2007 - 02:31 pm: |
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Gavin, you mean "constant change is here to stay"?
I love Rush quotes. http://www.jsonline.com/story/index.aspx?id=656607 |
