Thanks in advance.
I'm relatively new to this forum and a simpleton when it comes to electronics. Last night my SDA-2s the ones with two tweeters, 3 mids and a bass, per speaker partially died. I recently got a vintage Marantz 4140 Quadradial 4 channel amp. Cosmetically looks mint, functionally it was scary scratchy. I cleaned the pots best as I could. Big improvement but still some scratchiness. I plugged the SDAs into the front and some vintage Infinitys into the rears. After gently fiddling around a bit I got awesome sound. WEEE! Then I noticed the tweeters in the right speakers had gone completely silent. AHHH!
I swapped a good tweeter from the left speaker with a bad one. Silence. AHHH!! I made more tests with another amp and found out that 3 of 4 tweeters were silent. Sob! More test and I found out all the tweeters worked but in only one position on the left speaker. Phew! I not sure but the rest of the drivers may be affected. The Infinitys sound just fine.
What did I do to my most favorite Polk speakers?!? The interconnects were plugged in at the time. Did the I fry the crossovers or something?
Also I can't get on to Club Polk from home. Sigh...