Just put the components into my just finished DIY L300s which are on the DIY forum. Initial testing revealed some distortion in the higher and louder passages of some music in one channel. From past experience I'm quite sure it's either a cracked diaphragm or the coil scrapping the side of the gap in one of the drivers. But before removing the LE85 and 2405s to have them bench tested by someone I was contemplating running some kind of sweep generator tones in the higher frequencies through the amp to try to reproduce the distortion and therefore isolate the culprit driver. I'm hoping it's the 2405s because I bought them on eBay about 5 years ago and never used or tested them until now. Whereas the LE85s I've had for many years and a JBL repair center just installed new aluminum diaphragms in them a couple of months ago. But have not had very good luck with JBL repair facilities in the last few years.
Anyway since I got rid of my Heath-kit signal generator about 40 years ago, I was wondering if anyone knows of some computer software program that would be useful in trying to do this. Maybe putting tones of 5 to 8Khz on a CD and playing it through the amp? Whatever. Any thoughts or ideas? Thanks.
Tom