Menu
Forum
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Gallery
New media
New comments
Search media
Members
Registered members
Current visitors
Classifieds Member Feedback
SHOP
Shop Head Units
Shop Amplifiers
Shop Speakers
Shop Subwoofers
Shop eBay Car Audio
Log in / Register
Forum
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
Log in / Join
What’s new
Search
Search titles and first posts only
Search titles only
Search titles and first posts only
Search titles only
General Car Audio
Subwoofers
Speakers
Amplifiers
Head Units
Car Audio Build Logs
Wiring, Electrical and Installation
Enclosure Design & Construction
Car Audio Classifieds
Home Audio
Off-topic Discussion
The Lounge
What's new
Search forums
Menu
Reply to thread
Forum
Car Audio Help
Enclosure Design & Construction
t-line box?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Immacomputer" data-source="post: 8290443" data-attributes="member: 570419"><p>I disagree here as well. You should focus your 1/4 wave length based around the sub's resonance in a sealed enclosure of the equivalent size that you're planning on using. There is PLENTY of pressure build up in a transmission line enclosure as the very nature of a transmission line is to transfer a high pressure area into a high velocity area. Think about how a transmission in a car takes torque and turns it into velocity. A transmission line enclosure works just the same way! My AE av12 had like a 24hz Fs and yet it had beautiful control well below tuning and Fs, even with 1200rms (though around 30hz excursion got a little scary with that kind of power but hey, it was only rated at 500rms to begin with!). I tuned to my line to 35hz because it was about 3 cubic feet total. That sub modeled to have an Fc of around 35hz in a 3ft^3 enclosure. And at 22hz, I had a 3dB peak and minimal excursion (though if you modeled the box as a ported enclosure, as it had a compression chamber, it would have also been tuned to 35hz). Pretty interesting stuff... that box got **** loud, **** low, and ridiculously musical and clean.</p><p></p><p>So you CAN tune above Fs without an issue but you REALLY need to use Martin J King's alignment tables PDF to calculate your line area. Too much line area and too high of a tuning with give you a ******, peaky, and uncontrolled enclosure. Also, tapping/self loading an enclosure can help reduce enclosure size and add more cone control. Google "tapped horn" or "tapped transmission line enclosure" for more information on that.</p><p></p><p>I'm not trying to be argumentative -- I just want to clear up some things that I've found to be different in my experiences with transmission lines. I find them interesting, beautiful, efficient, and best of all, low end monsters. Nothing tickles me more than playing low and flat below 30hz, no matter what output levels lol. I also want other people to experience these types of enclosures with their best face so I get bothered when I see inefficient designs or just poorly done (steve meade forum style: Fs/Sd ghettoness) enclosures because they turn people off to the type instead of continuing to play around with them and find new things that work!</p></blockquote><p></p>
[QUOTE="Immacomputer, post: 8290443, member: 570419"] I disagree here as well. You should focus your 1/4 wave length based around the sub's resonance in a sealed enclosure of the equivalent size that you're planning on using. There is PLENTY of pressure build up in a transmission line enclosure as the very nature of a transmission line is to transfer a high pressure area into a high velocity area. Think about how a transmission in a car takes torque and turns it into velocity. A transmission line enclosure works just the same way! My AE av12 had like a 24hz Fs and yet it had beautiful control well below tuning and Fs, even with 1200rms (though around 30hz excursion got a little scary with that kind of power but hey, it was only rated at 500rms to begin with!). I tuned to my line to 35hz because it was about 3 cubic feet total. That sub modeled to have an Fc of around 35hz in a 3ft^3 enclosure. And at 22hz, I had a 3dB peak and minimal excursion (though if you modeled the box as a ported enclosure, as it had a compression chamber, it would have also been tuned to 35hz). Pretty interesting stuff... that box got **** loud, **** low, and ridiculously musical and clean. So you CAN tune above Fs without an issue but you REALLY need to use Martin J King's alignment tables PDF to calculate your line area. Too much line area and too high of a tuning with give you a ******, peaky, and uncontrolled enclosure. Also, tapping/self loading an enclosure can help reduce enclosure size and add more cone control. Google "tapped horn" or "tapped transmission line enclosure" for more information on that. I'm not trying to be argumentative -- I just want to clear up some things that I've found to be different in my experiences with transmission lines. I find them interesting, beautiful, efficient, and best of all, low end monsters. Nothing tickles me more than playing low and flat below 30hz, no matter what output levels lol. I also want other people to experience these types of enclosures with their best face so I get bothered when I see inefficient designs or just poorly done (steve meade forum style: Fs/Sd ghettoness) enclosures because they turn people off to the type instead of continuing to play around with them and find new things that work! [/QUOTE]
Insert quotes…
Verification
Post reply
Forum
Car Audio Help
Enclosure Design & Construction
t-line box?
Top
Menu
What's new
Forum list
