Veteran 30's and a strange smell.

So i wired up 2 16 ohm V30's in paralell in a boogie rectifier cab.  I plug in my plexi and crank it up (100 watts) and Everything is working fine.  BUT, i notice a really strange smell.  It's not a burning smell but i can't quite place it.  It's definitely coming from the cab.  Is this normal when working the speakers for a break in period?