A special thanks to Bolserst & Golfnut

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Hi All,

I just wanted to publicly thank Boserst and Golfunt for helping me so much with my segmented electrostatic speaker build. I could not be happier with the results.

You guys are the best! I could not have done it without you.

Charlie Mimbs

speak%2B1.jpg
 
Hello Charly,

Nice looking system.
I'm wondering why you have a Ripole and a TL integrated. If I read the picture correctly, the TL is used as a beam splitter based on R Sanders principles ?
Just wonder which FR is used for each part of the hybrid LF drivers.

In my own build I also use a selfmade Ripole dipole woofer but only a single one at the centre between the ESL. ESL are segmented wire type, fixed on steel grids (comparable to the plastic louvre type) but with larger cells of 44x44 mm. My system is tuned with a miniDSP as crossover and frequency control and crossover F of 125 Hz. System integrates very well.

Best Regards,

Edwin
 
Hello Charly,

Nice looking system.
I'm wondering why you have a Ripole and a TL integrated. If I read the picture correctly, the TL is used as a beam splitter based on R Sanders principles ?
Just wonder which FR is used for each part of the hybrid LF drivers.

In my own build I also use a selfmade Ripole dipole woofer but only a single one at the centre between the ESL. ESL are segmented wire type, fixed on steel grids (comparable to the plastic louvre type) but with larger cells of 44x44 mm. My system is tuned with a miniDSP as crossover and frequency control and crossover F of 125 Hz. System integrates very well.

Best Regards,

Edwin

Hi Edwin,

Yes, the TL box doubles as a beam splitter. Mine is symmetrical versus Sanders' asymmetrical corner splitter but it's likewise a nifty solution to cramming the TL's large volume into a small footprint.

I had thought my splitter was unique until I discovered recently that Shackman built the same "V" section splitter in one of their speakers 25 years ago. I should not be surprised, as it's the most simple and direct solution for mating a large box volume to a hybrid panel.

The Ripoles were an afterthought. Originally I had no subs. The TL's play clean down to 30Hz or so but a couple of 10's can only move so much air so I decided to add a sub.

I used a large (2.8 ft3) 12" sealed box sub for a while but I never could get it to blend well with the TL's and it excited my room's fundamental resonance so badly (the dreaded one-note boom), I ended up tossing it.

And then I built the Ripoles. They aren't chest thumpers but they're very clean, they don't excite the room modes and they blend wonderfully.

The system is tri-amped using a Behringer DCX2496 crossover feeding (2) Carver TFM-25's. The Ripoles cross in at 50Hz using a 48db/octave slope and the stat panels cross in at 218Hz, also using a 48db/octave slope.
 
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