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hz numbers on a 15" 2 driver (Read 35001 times)
John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #225 - 06/07/06 at 23:39:53
 
60,

You must get in trouble with the wife all the time misinterpreting what people say.  Mattress on the ceiling?  :'(
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Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #226 - 06/08/06 at 14:25:57
 
60, "AFRS" in the other 'active' HWK thread just told me the HWK is 140 pounds. (10 stones BTW, just in case that's your form of measurement.  ;))

John,  mattress is a good idea. I've thought about that, but I'm too lazy to drag a "califorina king" mattress down a flight of stairs.  ::)
Might rob the kids crib mattress (but it's plastic coated)
Or my son's 'twin' mattress  ;D

Cieling tiles are USG 2X2 acoustic, (very heavy compared to the cheap/standard white one's) They've got a very agressive texture on them.

Bob
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John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #227 - 06/08/06 at 15:41:49
 
Bob,

I was just making sure those recessed boxes weren't highly reflective.  Is it a basement?  If so, which walls are concrete?  Sure room treatments can always help, but from the photos it doesn't look like something I'd be in a rush to blame.  Unless you have some parallel concrete walls creating havok with room modes, you can throw room treatments under the header "fine tuning" on your list.  A 20-200hz tone sweep, can tell you if you have mode problems.  That will also reveal any holes in response with your sub/mains integration.  

I was asking what's behind that wall in front, not behind the screen.  Can't put a sub behind a screen anyway...too much air movement.
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60ndown
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #228 - 06/09/06 at 02:22:19
 
[quote author=John in CR  link=1145573673/210#224 date=1149718674]If you want to see what bass traps might do, haul a couple of mattresses down there too.  Are the recessed areas on the ceiling in front of the seating area reflective or do you have acoustic tiles up there too?

[/quote]

cmon it was a fair misinterpretation? first matresses get mentioned and then the celing?
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bassboy
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #229 - 06/09/06 at 02:39:29
 
Technically, mattresses on the ceiling would work for higher frequency bass, at least to some extent.  Placing them standing up, across a corner, however, would probably get a lot more mileage out of them, and work on a broader range of frequencies.
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John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #230 - 06/09/06 at 02:45:18
 
60,

Are you sure you aren't from Mississippi?

Those of us from Louisiana thank God on a daily basis for giving us Mississippi.  That way someone else gets to be #50 in almost every category. Grin
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« Last Edit: 06/09/06 at 02:47:16 by John in CR »  
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Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #231 - 06/09/06 at 12:20:18
 
John, it is a basement. 3 walls are concrete. Front, (behind the screen), the Back, and right walls are your standard basement foundation walls. Standard 2X4 walls with insulation. The only wall that deviates from the norm is the back wall. The drywall is somewhere around 8" or 9" from the concrete. This was done so I could avoid the various ugly "drywall framed boxes" people use to 'encase' the plumbing. I wanted a cleaner look. All walls in the basement are insulated with 'the usual', including interior walls.

Ok, who's comin' over to help with the mattress installation?  :-/ I'm going for all walls, floor and ceiling.  :-*

Ok, not really.

Bob
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« Last Edit: 06/09/06 at 12:21:40 by Bob »  
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Gex
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #232 - 06/09/06 at 13:09:10
 
Hey 60 don't feel bad about being 50.
Canada is the state that Americans did not want.

Thats a joke. in case  put anyone in a crank.

Funny you should mention the mattresses ( not the ones on the ceiling) I have a heck of a time getting my wife to throw out old mattress. maybe I could convince her to recover them with nice fabric and store them were the stereo is. Then I could get the stupid things out of my office.
Its so quiet in there I can can't hear myself think and I have to, or I don't think.
could be the reason for the last 100 or so posts  :)
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Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #233 - 06/09/06 at 13:18:27
 
Line your walls with old mattresses from the "junk store", saves money on drywall. Saves time on mudding the joints.  ;D
And just think, NO PAINTING!

Bob
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ado420
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #234 - 06/09/06 at 16:24:00
 
[quote author=Gex  link=1145573673/225#233 date=1149854950]Hey 60 don't feel bad about being 50.
Canada is the state that Americans did not want.
[/quote]
Really?
Because I always thought Canada was the state for Americans that aren't liked amongst other Americans  :D
Except for Alaska, that's an even further, more boring, exile.
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ado420
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #235 - 06/09/06 at 16:25:42
 
[quote author=Bob in St. Louis  link=1145573673/225#234 date=1149855507]Line your walls with old mattresses from the "junk store", saves money on drywall. Saves time on mudding the joints.  ;D
And just think, NO PAINTING!
Bob [/quote]

Ya, you don't have to paint because someone already beat you to the punch  :)
That's why it's in a junk store
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John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #236 - 06/09/06 at 16:56:56
 
Bob,

You're getting some bass trapping with those interior walls over the concrete walls, but they're probably all tuned the same.  Next time you can incorporate a panel bass trap design into the construction at essentially no cost.  I did that in my room and my entire room is a giant bass trap tuned to a very wide range of frequencies.  I don't need any additional bass treatments.  Your room probably isn't too bad at handling bass either.  A LF tone sweep will tell you a lot.

How much air volume do you think is enclosed with that back wall?

How difficult would it be to move that front cabinet/shelf unit away from the front wall?
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60ndown
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #237 - 06/09/06 at 17:32:10
 
[quote author=John in CR  link=1145573673/225#231 date=1149817518]60,

Are you sure you aren't from Mississippi?

Those of us from Louisiana thank God on a daily basis for giving us Mississippi.  That way someone else gets to be #50 in almost every category. Grin [/quote]

i must be number 51, i have no idea what you just said.
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John in CR
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #238 - 06/09/06 at 18:07:32
 
60,

I thought you were changing your name to 40nUp.  You understand that one don't you?
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Bob in St. Louis
Ex Member



Re: hz numbers on a 15" 2 driver
Reply #239 - 06/09/06 at 18:14:20
 
[quote author=John in CR  link=1145573673/225#237 date=1149868616]How much air volume do you think is enclosed with that back wall?

How difficult would it be to move that front cabinet/shelf unit away from the front wall? [/quote]

Are you looking for the volume behind drywall including the 4" insulation, or volume between back of insulation to the concrete?

Horrible PITA to move cabinets. Don't know if it's possible with the way the screen attaches to the wall. (wouldn't have a wall to fasten to anymore if it's moved out)

Bob
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« Last Edit: 06/09/06 at 18:15:53 by Bob »  
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