Transmission Line with 4 Drivers

[R-K Rønningstad]

Thanks for sharing! That certainly seems like a nice design, which should work quite well with bass guitar. I believe that the fundamental frequencies of a 6-string bass guitar cover the frequency range from 31Hz–523Hz, while the harmonics can extend all the way out to approximately 4kHz–5kHz.

I wonder how those 3x B200 woofers were connected? Were they 16-ohm units?

Back in the day I tried to DIY the AudioTronics CM3. The standard CM3 had two 8” woofers and a ribbon horn. I used the 8ohm KEF B200 and the Gamma VLD12 ribbon horns, and a first order passive filter. The B200s I did connect in parallel.
There are quite some useful information here.
(https://sm5b.se/audiotronic-est/)
It is in Swedish though.
I made my enclosure according to figure 6 in the Bailey article.
Later I purchased Quad ESLs and never looked back…
Until now, as I found some spare enclosure parts etc…..

 

[R-K Rønningstad]

We could of course start a thread in CM3 clones. Maybe the use of e.g. miniDSP would improve filtering? First order was a risk sport, frying ribbons.