Hello there. I was very happy with my new acquired set of NS-1000M. Near mint, first owner, etc. So I hooked them up to my M-2 / C-4 combo this weekend and I noticed that the left side sounded a bit more dull than the right side. My C-4 was restored, so I thought it may be due to the C-4. First swapped the speaker wires: no change. Swapped the M-2 / C-4 to my CR-800: no change Swapped tweeters to rule out the crossovers: dull sound went to the other side. Yikes, then it must be the tweeter They both measure 6.2 Ohms, but one has just a lower output. Any ideas guys? Or is this tweeter toast?