Using a t-line speaker on a car door? - diyAudio
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Old 29th August 2005, 08:29 AM   #1
ksl is offline ksl  Estonia
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Default Using a t-line speaker on a car door?

how does the small listening room size affect the sound of a t-line on a car door?
is the idea to use a 4" speaker in a t-line in the car very bad?
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Old 29th August 2005, 04:44 PM   #2
Bose(o) is offline Bose(o)  Canada
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It would sound awesome and it isn't a bad idea. As long as the tuning of the TL doesn't go below the longest mode frequency of the car (The longest dimension). I have played extensively with TL's in the automotive environment and the only problem with the TL is finding the space for such an enclosure.

Is that a Nissan Sentra?
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Old 29th August 2005, 06:21 PM   #3
ksl is offline ksl  Estonia
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this is an example pic from net (mazda 626)
the car in use is VW Golf3 GT (2-door)

so, the difference can be heard? it can be better than just a sealed box?
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Old 30th August 2005, 06:10 AM   #4
Bose(o) is offline Bose(o)  Canada
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Absolutely. All of the work that it takes to figure how the TLs will fit is definitely paid off with the nicer sound of the TL. You'll get even more loading from the TL because of the environment inside the cabin. Since you'll be using this for mid-bass drivers, you'll want to tune the TL near the xo point for the woofer (if you have one).
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Old 30th August 2005, 06:25 AM   #5
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dumb question, but wouldn't a simple ported enclosure be a lot easier to build and still give a comparable result to TL?
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Old 30th August 2005, 06:30 AM   #6
Bose(o) is offline Bose(o)  Canada
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All enclosures have their pros and cons, but I think if someone is able to use a TL, that it will provide superior results.

In my installs, I typically end up using sealed/ported enclosures because of size constraints. Damn them size constraints!
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Old 30th August 2005, 06:49 AM   #7
rcw is offline rcw  Australia
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Default transmission lines

The thought that I always have about transmission lines is that they are periodic transmission lines in which people go to a lot of trouble to damp out all of the resonances except the one that occurs at around one quarter wavelencgth of the line.
There is already a device which has an inherant property of having only one resonance and that is called a reflex enclosure. Altogether a lot simpler to design and easier to make, and completely free of the series of resonances that is inherant property of a transmission line.
The difficulty of a reflex of course is that it lacks the mystique of a tl.
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Old 30th August 2005, 05:03 PM   #8
Bose(o) is offline Bose(o)  Canada
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Reflex has many more than one resonance and higher excursion than a TL would have below tuning frequency. TL's have better group delay and better mid-bass response, this is why many like TL's and frown upon simpler designs. Reflex has resonances of the actual vent and with a mid-bass driver one would have to dampen this resonances from escaping into the listening area unless they like a cave-type sound.

A superior bass system (a way to control the back wave, ML-TL, reflex, etc, etc.) will always have a better mid-bass response (phase, frequency, CSD, etc, etc.) and this is one reason why TLs have the fanfare that they do.

IMO, TLs and Open Baffle Loudspeakers are superior in sound and if you can't do either then look at a sealed or vented enclosure.
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