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What are the attempted advantages of a TL speaker cabinet with equal sizes channels all the way to the port, as opposed to each channel being wider than the last?
Also, what is being achieved by a decreasing size horn channel compared to an increasing size channel?
Are there any simple answers to these questions? I probably won’t comprehend a high level answer.
128x128sound22card
audiokinesis
2,737 posts
 

"Now with the computer design tools available, a TL can be designed on the computer and perform as predicted."

I believe you, having been amazed at the performance of speakers by Bob Brines, who I understand licensed your software back when it was available.  I'm familiar with some of the wideband drivers he used and would not have expected them to deliver the kind of low-end performance he was getting.

One of the things I've found attractive about vented boxes is, adjustable tuning via multiple pluggable ports.  Without giving away any trade secrets, are there techniques which would make would a somewhat adjustable transmission line be feasible? 

Thanks,

Duke

mjking57
14 posts
 
Bob Brines, Jim Salk, and Dennis Murphy to name a few have all used my software (Paul Kittinger did the actual TL design work for the later two) to design the TL portions of their speakers. Bob Brines was a very early supporter of the software and is a very talented designer, his understanding of TLs is excellent.

I think there is some adjustment potential with a TL design. Adding internal obstructions and/or a constriction at the open end can always be used to change the tuning frequency and response. Also changes to the stuffing density and location is another tweak that can be used to change the TL's response.  
sound22card's avatar
sound22card OP
26 posts
 
Are you saying we could build a TL speaker enclosure, to accepted design, ....and then play around with the exit size to see if it enhances the sound?  (along with changing the stuffing and its placement)  This sounds like 'fun' to me! 
mjking57
14 posts
 
Yes, that is what I am saying. I am talking about small changes to the tuning and sound, not transforming a poor performing speaker design to a world beater. The trade-offs may have improvements in one area but degradation in another. No magic, no miracles.
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