hi there, i have a pair of SDA-SRS signatures (1984/85 i believe) that I'm working on for my father. The outer pair of woofers were ALL blown, luckily i had some spare 6503 drivers from a set of SDA-CRS+ of similar vinatage. But I'm still having some issues with the quality of the sound from the cabinet. As best I can work it, there seems to be an emphasis on the more out of phase audio material (aka side guitar is more evident in front of speaker or in stereo sweet spot than center vocal).
I'm inclined to blame this on the tweeters... i'm getting some output out of the tweeters from the questionable cabinet, but not nearly as much as out of the correct one, perhaps a resistance issue? I've verified wiring, switched out amps, etc. Any suggestions? My next step was to check relative output of known good tweeters out of the good cabinet vs. possible bad ones out of the other cabinet... any ideas would be helpful.