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In Reply to: RE: If the load impedance is indeed around 965K, a 0.005uF cap... posted by jeffreybehr on March 18, 2016 at 12:10:19
You might try a Russian SSG. I think you can buy them in that value. That is the most transparent capacitor I have heard, with the possible exception of the 100X more expensive Vcap CuTf.
Follow Ups:
...a 0.01uF SoniCap Platinum. FP will be about 16Hz, which is plenty low enough to avoid phase errors in the audible band--of these MR drivers, that is--and high enough to block or greatly reduce DC or large noise pulses which might destroy those irreplaceable drivers.* I tend to do this a lot, but my system has never sounded better, so some good must come of it. ... :-)
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Edits: 03/25/16
I would consider several points:
The amps can make a lot more power than the drivers can handle! Its only prudent to install a tweeter protection fuse of some kind! One mistake could cost you a fuse or a driver: your choice.
You might also consider putting a coupling cap at the output of the amp. It does not have to be very big and could save you some headaches- after all- the output section of the amp is direct-coupled.
Well, they're not fragile; being B-G mag-planar drivers, they simply can't be replaced, new at least, as B-G's new foreign owners decided to stop making them.Of course the tweeter has its high-pass filter in the x-over, but the MR doesn't. I remember asking GR Research's Danny Ritchey, the designer of the speakers, what filter point I should use on a high-pass filter with the 8- and 50-Watt amps I had at the time. We went back and forth, with him answering every number I offered to him (as in 200Hz? 100Hz? 50Hz? 25Hz? None at all?) with an 'OK'. He then said something like my low-power amps were not able to overdrive the panels, so it didn't much matter.
So with each 10" MR driver rated at least 75 Watts power handling by the most-conservative method...
http://gr-research.com/pdf/Neo10.pdf
...the four of them will handle at least 300 Watts, so I'll NOT be adding a new series cap between the amp and the x-over.TYVM for your help.
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
Edits: 03/21/16 03/21/16 03/22/16
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...a few years ago to change the 1M-Ohm load resistors to 390Ks and use a 0.01uF SoniCap Platinum, for a high-pass-filter point of 41Hz.
Finished!
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Tin-eared audiofool, large-scale-Classical music lover, and damned-amateur fotografer.
William Bruce Cameron: "...not everything that can be counted counts, and not everything that counts can be counted."
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