Transmission line speakers!

any of those wishing to differ..can..see how your corrections, edits and such fare on Wiki, or better yet on the….speaker market…. 

I had a rather lengthy conversation w Richard Vandersteen yesterday, we talked about other exotica like tanking circuits and Zobel networks, his use of transmission line didn’t come up…but when we get past Sunday the day of rest, i will certainly ask him….

Since 1977, not everyones cup o tea. How freaking boring that would be

Carry on

Pick your expert carefully….music is AC…. ha

tomic601,

I can't thank you enough. I was feeling like the odd man out. I appreciate your thorough description of TL design. Having owned the large TDL Monitors, I can attest to the scary extension of their bass. It didn't make itself known above other frequencies except when called for.

I recall a short while after I bought them in the 80's, I had a couple of friends over and we were listening to the first Enya disc at a lower level as we chatted in the living room. Suddenly, the synthesizer hit a subsonic note, and it felt as if a very heavy object had hit the floor. I'll never forget the first time I had that experience with them.

I started designing Transmission line speakers in the mid '70's. They can be real good for the money. These days I use a ported cabinet design because you can get a better final performance curve.

Though not a speaker designer, this meets with my experience. 

I had  pair of Spendor D7 which uses a quasi-transmission line bottom firing port.  The bass and sub-bass was so deep and effortless, a speaker with very special bass.  It improves the efficiency of bass response and makes them easier to position. 

No, I don't believe the Spendor D7 or D7.2 even qualify as "quasi-transmission line" (whatever that means). They are simply bottom ported. 

I had a pair of IMF TLS 80s in the mid-70s and loved the bass they produced. However, I found the midrange quite poor and they did not image very well. I sold them for a pair of Braun L810s - bass not as deep as the IMF but the midrange was far superior. 

My Acoustic Zen Crescendo II’s are a transmission line design...Best sounding loudspeakers I have ever heard or owned.

Nice demo!