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Good info!

Chris, Thank You for the info. Now this is what I was looking for in replies. :)

I totally agree with you about either building a new amp or speaker if there was an issue with proper matching OTL amp and speakers. I have built a tube amp from kit and have done a few DIY speakers but I am no expert in building tube amps from scratch let alone OTL amps.

What got me interested in OTL amp designs is how people who owned them said they were the best sounding amps the have ever had but speaker matching was a must to get good bass. I would really hate to add anything between the OTL amp and speaker that would take away from what the OTL amp brings in sound. So I do understand where you are coming from.

I hear those 6C33C tubes are pretty nice? Are these largely available?

I now have got some good info and direction/s on what to do which will help me out big time. I just wish I could build that many amps from scratch. There are some OTL kits I could try and hopefully with the DIY GPA driver (Altec) based 2 way with Zilch Z19 xovers should be a good match. If that doesn't work out I do have a Line Array design in the works with BG planars and Silver Flute 6.5 drivers I have already that I can arrange to get the proper matching impedance for the OTL amp/s.

I will look into some of those designs you mentioned

Thanks again for the info!



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  • Good info! - Cougar 07:08:21 05/21/17 (0)

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