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transmission line enclosure


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audiocableguy 
Copper - Posts: 630
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Joined: January 27, 2003
Location: Idaho, United States
Posted: October 04, 2007 at 8:30 PM / IP Logged  
That MA Midbass driver is 82.8 db sensitive or should say insenstive. That's about the lowest I've seen in a while. You will need more than 75 watts. MA States the depth of that driver is 6". If you have that kinda door depth, go with the Adire Extremest for $200 a pair.
haemphyst 
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Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 04, 2007 at 11:41 PM / IP Logged  
And the Adires are now priced in unobtanium. They simply don't exist anymore.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
audiocableguy 
Copper - Posts: 630
Copper spacespace
Joined: January 27, 2003
Location: Idaho, United States
Posted: October 04, 2007 at 11:48 PM / IP Logged  
I thought Acoustic Visions still had some left?
haemphyst 
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Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 04, 2007 at 11:52 PM / IP Logged  
So did I... I just found out about 5 minutes ago, that they just haven't updated the site, and they are out.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
tubbs04 
Copper - Posts: 212
Copper spacespace
Joined: March 31, 2007
Location: United States
Posted: October 05, 2007 at 1:25 PM / IP Logged  

haemphyst wrote:
Sorry... my mailbox was full... got some space now! transmission line enclosure - Page 2 -- posted image.
Now, what are you asking about? I'm lost. (And I'm truly not trying to be obnoxious about that, either... I really am lost!) The TL is certainly NOT where you want to go for mid-bass - it's completely impractical there, due to their physical size. Are you asking about the whole system, and what I'd do, or are you asking about TL design?
TLs are also notoriously INefficient. VERY good extension, and generally meant to be a true subwoofer system, you'd rarely, if EVER cross them over higher than about 60Hz, which is where I am with mine right now. Output monsters, they ain't, though.

I was asking if a TL enclosure would help me with bringing bass up front... I simply asked bc I have no clue how they work or what they are designed for... You've answered that it wont help me... So thank you, thats one less headache for me hahaha...

And yes, the MA's aren't just the best, but the store I work for didn't have a MA demo vehicle, So I put my truck to use.. And I get a nice price so I can't really complain... Most cars around here just seem to just be crammed full of mis-matched speakers and other crap, So from what I'm normally exposed to, MA sounds pretty nice... I really wish there where some of the brands around here that ya'll know about, but it's northeast mississippi... we're behind on everything... hahaha

Thanks for the help!

...don't crush the weasel...
audiocableguy 
Copper - Posts: 630
Copper spacespace
Joined: January 27, 2003
Location: Idaho, United States
Posted: October 05, 2007 at 9:25 PM / IP Logged  
keep in mind that if your demo vehicle sounds like ass you can loose business.
DYohn 
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Joined: April 22, 2003
Location: Arizona, United States
Posted: October 05, 2007 at 10:48 PM / IP Logged  

Haemphyst is the king of TL subwoofers on this forum, but a TL can be done for any part of the frequency spectrum including midbass or midrange.  I've seen TL-loaded tweeters... in any case, if you're really interested in transmission line design theory, HERE is a great place to start reading.

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tubbs04 
Copper - Posts: 212
Copper spacespace
Joined: March 31, 2007
Location: United States
Posted: October 06, 2007 at 9:39 AM / IP Logged  

audiocableguy wrote:
keep in mind that if your demo vehicle sounds like ass you can loose business.

true..... but like I said, most vehicles around here just have thrown together mis-matched (mostly sony from different years) equipment.... 98% of people around here think it sounds great... but I smell what your steppin in...

...don't crush the weasel...
tubbs04 
Copper - Posts: 212
Copper spacespace
Joined: March 31, 2007
Location: United States
Posted: October 06, 2007 at 9:42 AM / IP Logged  
DYohn wrote:

Haemphyst is the king of TL subwoofers on this forum, but a TL can be done for any part of the frequency spectrum including midbass or midrange.  I've seen TL-loaded tweeters... in any case, if you're really interested in transmission line design theory, HERE is a great place to start reading.

Thanks, I'll deffinetly check it out!

...don't crush the weasel...
haemphyst 
Platinum - Posts: 5,054
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: October 07, 2007 at 7:48 PM / IP Logged  
DYohn wrote:
Haemphyst is the king of TL subwoofers on this forum
Thanks, Dave! I do appreciate the props!
DYohn wrote:
I've seen TL-loaded tweeters...
TL loaded tweeters? Wouldn't it have to be open backed for a TL to function in any respect? I am NOT doubting that you have seen such an animal, Dave, but was it a purpose-built driver? Otherwise I don't personally see how it could work.
DYohn wrote:
HERE is a great place to start reading.
Indeed... A very valuable resource.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
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