Help with old SDA-2 speakers

dbratton
dbratton Posts: 6
edited February 2011 in 2 Channel Audio
I am posting this here after starting a thread in a different area. I think this may be a more appropriate place for my issue.

I have a pair of SDA-2s that I bought (practically stole) from a pawn shop. I have had them for a while now, and I love them. Recently, I had to move them and blew a mid range speaker. My question is about how this happened. I disconnected the speakers from the amp which was unplugged. I then disconnected the speaker cables from the speakers. After that I unplugged the interconnect cable from the left speaker and there was a loud pop and hum from the right speaker. I hurriedly pulled the cable out of the other speaker and the noise stopped, but my mid-range speaker has not worked since then. (I am looking into getting a replacement part.)

I know that the cable leads did not touch, so nothing shorted. My questions are what caused this? Is there some sort of capacitor inside these loudspeakers? How on earth was there any power available to the speakers to cause the pop?

Thanks for any info.