Quote:
brucek wrote:
 You did a beautiful job. Looks great. I'll bet Ilkka would love to test that thing.....
I guess the answer of whether you need a hi-pass would be answered in a response test of your electronics. This is fairly easy to do with REW. It involves doing a frequency response of your processor and BFD in an REW loop. Often the electronics results in a 1st order rolloff that you would have designed into a high-pass filter anyway, so the high-pass isn't necessary.
With a tune of 17.5 Hz I doubt you'll need a high-pass (especially with the xmax and xlim of that driver).
You can certainly calculate a new value of coupling capacitor at the input to your ART box with the corner frequency being where you feel you require protection.
If I look at the ART box mod thread, I see that the claim is that the input pot is about 100K. So, if that's accurate, and if you wanted an fc around 10Hz for the filter, then the series capacitor would be about a 0.15uF (back of a napkin calculation). That's a fairly standard size you could try and test (with REW) and it would result in a 1st order ~10Hz high pass filter. That's if you think you need it.
Ignore anything below 10hz since the RS calibration file only has been tested to 10Hz.....
Have you tested it in a corner yet?
brucek |
Thanks. No, I haven't put it all the way into a corner. I 'm going to need to move a few things around.
Peter