Quote Originally Posted by kmanusa View Post
David, you are correct, a cap value of 3uF is too low for this application; a 10uF cap should do and I have one in my parts junk box. I have not seen any published spec on the impedance of the driver over its freq range. DCR is fairly low so I would expect the low freq cutoff to be in the 4kHz region using the 10uF cap in the HPF. Have you run a freq sweep of the 044Ti up to 20kHz? I would expect it to be fairly clean at an appropriately low drive level assuming no fouling of the gap.
I have run sweeps, yes, but nothing recorded as an image. DCR is fairly low, 4.0 ohm +- 0.4 ohms.