*go to cut holes in kick pods*
AllStar1500bd
5,000+ posts
Times have changed
Poly-fill in the kicks FTW.oh yea. heres two thingie-ma-whats-ems-called.
theres that aperiodic thinga-majig.
and thats a picture of the listening process... we had the rta on my lap.
9830 & H-701 FTW.
Freakin' amazing set-up. Secksay.
OP
req
5,000+ posts
am a mod.
- Thread Starter
- #111
lol, definatly NOT polyfill //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
its fiberglass insualtion. and its an aperiodic membrane.
but thanks //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
so dave, why is what better for what reasons? you are such a descriptive man //content.invisioncic.com/y282845/emoticons/uhoh.gif.c07307dd22ee7e63e22fc8e9c614d1fd.gif
AllStar1500bd
5,000+ posts
Times have changed
What sort of differences in response do you get from it?
Johnny Drama
5,000+ posts
Banned
AP setups are similar to polyfil. It uses the membrane to slow the back wave down tricking it to think it is a larger enclosure. You can vary the thickness to change the charicteristics too.
Basically it is a very small (barely bigger then the driver itself) enclosure that is vented with the membrane.
There is a good write up on ECA in the tutorials section.
EDIT: Found it.... http://www.elitecaraudio.com/article.php?sid=18
GCAdidas13
10+ year member
heh.
Except for ours is a bit different. We have the "inner" enclosure that is as small as possible (the Volcanos that are pictured in my camry fotoblog) and then there's the outer enclosure that holds the volcano in place. You can also see the insides of the volcanos in the picture of the AP membrane req posted.
The outer enclosure also has a hole in it for the back wave (so there's nothing "sealed" about it) and that vents directly into the carpet, which breaks up the rear wave enough for gov'ment work.
The outer enclosure also has a hole in it for the back wave (so there's nothing "sealed" about it) and that vents directly into the carpet, which breaks up the rear wave enough for gov'ment work.
AllStar1500bd
5,000+ posts
Times have changed
Thanks for the link. I learned something today //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
VIPER118
10+ year member
I Wire Teh Amps Wrong
expert... you? pffft...
sorry i can't make it down guys but work pwn's me //content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif
OP
req
5,000+ posts
am a mod.
- Thread Starter
- #118
whipee.
nother fun day of stuffts.
the mic i have is not the most accurate on the planet. so we figured out by playing different frequencies (mostly the lower octaves) they are noticably higher than the rest. so the mic is biased below about 250hz, we could hardly hear any midbass at all. so as the frequencies get lower, the mic picks up more vibrations in the air because its pretty freakin loose diaphragm. so what we hear on this seems to be flat i spose'.
each dot represents + or - 3 decibels. mind you, as you RTA somthing the bars move around a bit. so they are pretty much within +\- 3db of a flat curve. the subs were off because they biased 30hz and 80hz really bad and it would drown out the rest of the mic response. and i dont think the mic picks up anything above 16khz or so - as you can see from the picture, and it starts to cut off round 10k pretty bad.
all in all, it sounds pretty fucking awesome.
heres a better image for the RTA. just so you can read it easier.
nother fun day of stuffts.
the mic i have is not the most accurate on the planet. so we figured out by playing different frequencies (mostly the lower octaves) they are noticably higher than the rest. so the mic is biased below about 250hz, we could hardly hear any midbass at all. so as the frequencies get lower, the mic picks up more vibrations in the air because its pretty freakin loose diaphragm. so what we hear on this seems to be flat i spose'.
each dot represents + or - 3 decibels. mind you, as you RTA somthing the bars move around a bit. so they are pretty much within +\- 3db of a flat curve. the subs were off because they biased 30hz and 80hz really bad and it would drown out the rest of the mic response. and i dont think the mic picks up anything above 16khz or so - as you can see from the picture, and it starts to cut off round 10k pretty bad.
all in all, it sounds pretty fucking awesome.
heres a better image for the RTA. just so you can read it easier.
DBfan187
5,000+ posts
Supa's mom was here!
are you RTA'ing each side individually?
DBfan187
5,000+ posts
Supa's mom was here!
Isn't that middle line 0dBs? Isn't that where the line is supposed to be flat @?
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