Ported and enclosed
King of Ricers
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Originally Posted by TJElite
OK, what are the specs of the ported box? what size sealed box? Any particular woofer?
I'll take a couple of liberties in the meantime. Here is a Crossfire BMF1028, 10" woofer in a sealed 1 cu ft box vs. a 1 cu. ft box tuned to 35 hz. The orange is the ported response, the red is sealed.
At 27hz, the sealed box is approx. 0.5 db louder than the ported. You can also see how the ported box rolls off at approx. 12db per octave from 50 hz, while the sealed rolls off at a shallower 6 db per octave.
Since these are arbitrary designs for an arbtrary woofer, I don't know how this pertains to the original question. But you asked for it.
Toby
I'll take a couple of liberties in the meantime. Here is a Crossfire BMF1028, 10" woofer in a sealed 1 cu ft box vs. a 1 cu. ft box tuned to 35 hz. The orange is the ported response, the red is sealed.
At 27hz, the sealed box is approx. 0.5 db louder than the ported. You can also see how the ported box rolls off at approx. 12db per octave from 50 hz, while the sealed rolls off at a shallower 6 db per octave.
Since these are arbitrary designs for an arbtrary woofer, I don't know how this pertains to the original question. But you asked for it.
Toby
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King of Ricers
Joined: May 2005
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Originally Posted by TJElite
Ding, ding, ding, ding, ding...
Johnny, tell him what he's won...
Toby
Johnny, tell him what he's won...
Toby
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isuck
Joined: May 2010
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Yeah i was just curious, im not spending any money till i buy my Z32 =P
I'm ok with my dual 12" ported polk and my infinitys. Thats perfect for now. I'll think about sealed for the Z32 =/ especially since it has a bit more confined space than my altima trunk.
But yeah cool info guys, thanks for the heads up and bring down on my ported
notladstyle really answered a lot, i knew mp3's fked up my stuff but i didnt think to that extent, too bad i dont have the originals of the music i have, its hard to find so im kinda stuck with it. i guess good thing is the more recent the release the better the bass.
I wish i knew some good music to really get the bumpin going.
I'm ok with my dual 12" ported polk and my infinitys. Thats perfect for now. I'll think about sealed for the Z32 =/ especially since it has a bit more confined space than my altima trunk.
But yeah cool info guys, thanks for the heads up and bring down on my ported
notladstyle really answered a lot, i knew mp3's fked up my stuff but i didnt think to that extent, too bad i dont have the originals of the music i have, its hard to find so im kinda stuck with it. i guess good thing is the more recent the release the better the bass.
I wish i knew some good music to really get the bumpin going.
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Originally Posted by P057
I wish i knew some good music to really get the bumpin going.
https://www.tamparacing.com/forums/a...songs-jam.html
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I got a dig bick. You this read wrong. You read that wrong too.
I got a dig bick. You this read wrong. You read that wrong too.
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Originally Posted by P057
notladstyle really answered a lot, i knew mp3's fked up my stuff but i didnt think to that extent, too bad i dont have the originals of the music i have, its hard to find so im kinda stuck with it. i guess good thing is the more recent the release the better the bass.
I wish i knew some good music to really get the bumpin going.
I wish i knew some good music to really get the bumpin going.
I use two programs, both free. The first is called exact audio copy. This program makes a copy of any CD. The neat part is that it uses error checking to make perfect copies, even from banged up CD's. It won't work with seriously trashed CD's, but most scratches, etc. seem to be fine.
The second program is called LAME. Its an MP3 VBR creation algorythm created by some guys at MIT (I think). Its built in to EAC. It basically goes through and assigns bit rates based on musical content. The higher the complexity, the more bit rate it gets. This gives high sound quality, in small spaces. I've got an IPOD full of VBR tunes done this way, that I'll be happy to let you all listen to on Saturday. Some of it is pretty complex music, and I can't tell any difference from the original CD.
One more thing to note, this applies to MP3's only. The Itunes stuff is actually AAC, which is the audio Codec of MP4's (movies). A 128kb/s AAC is significantly better than a 128kb/s MP3. For MP3's, you need to be in the 300+ Kb/s to sound good. LAME encodes up to 600 something. That's the problem with most peer to peer song shares...big bit rate = big size = long transfer time...so most rips are of very low bit rate.
Toby
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isuck
Joined: May 2010
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yeh, i know all of that, i just didnt know it knocked off so much out of the bass section. Makes sense since most people would listen to their mp3s on their headphones or something which produce (GENERALLY) not too much heavy bass.
I like VBR, problem is when i download junk off BT, usually people put it in 128kbps...
but w/e
I like VBR, problem is when i download junk off BT, usually people put it in 128kbps...
but w/e
