A Picture I have been looking for has finally appeared on Pinterest.

[TLS Guy]

I have been looking for a picture of John Wright's (TDL) last design just before his untimely early death. It is his dual TL speaker.

It is a dual TL. The two bass speakers are actually in one line and the two smaller drivers in the other.

It looks as if someone may still own one of these speakers.

As far as I am aware, the BBC Maida Vale monitors, this TDL speaker and my left and right mains are the only dual TDLs built. The BBC speakers are long dismantled.

 

[shadyJ]

Interesting looking design. An early WMTMW. Looks like it should have a very broad horizontal dispersion. Potentially very narrow vertical dispersion. I would be curious to know the crossover design and driver performance.

 

[TLS Guy]

Interesting looking design. An early WMTMW. Looks like it should have a very broad horizontal dispersion. Potentially very narrow vertical dispersion. I would be curious to know the crossover design and driver performance.

TDL made really good drivers, and John Wright's crossovers were second to none. That was a really expensive speaker and few were made.

That design was a major part of the inspiration for my left and right mains.

 

[Eppie]

Now that those bass drivers are in production again, it would be nice if someone posted design schematics. Would have to be a real enthusiast as most collectors would be leery about dismantling a rare vintage speaker. I assume the crossovers would have to be redesigned as the mids and tweeters would be long out of production.