blown woofer on B&W 603 S2

I've had a bad streak lately. About 4 months ago, I switched to a Dual 505 turntable with a XV-15 Pickering stylus due to problems with my other Project-1 deck. I have a B&K 2140 amp, B&K PT-3 pre-amp, and Creek OBH-8SE phone pre. My speakers were a Signets SLIIs. Well, the Signets had been played pretty hard and when I switched to the Dual a tweeter blew out right away.

I wanted to upgrade my speakers anyway, so I bought a pair of B&W 603 S2. They sound great! I was (am) happy with them. When I bought the B&Ws, I asked the dealer if I had to worry about the B&K amp blowing them. He assured me that the B&Ws would not and that it was a great a fit for the amp.

Last night I was playing a record at mid to high volume and out cuts the woofer on the left channel (same channel as the Signet). At the time, I did notice a strange smell, much like electricity, whch could have been something inside the speaker frying. The speaker itself has no visible damage on the outside, but the only sound I have is out of the tweeter.

So now I am wondering if the Dual turntable is the culprit. Is it at all possible that a turntable could spike the signal causing a speaker to blow? Maybe the B&K? I am not an engineer or audiophile so it's hard for me to troubleshoot, but I don't want this to happen again.

Fortuantely the speakers are still under warrenty but I'm bummed to be without a decent system for awhile.