I purchased a C12Q and put it in a Fender Concert II amp from 1985. I know the C12Q is one of the most iconic Jensen speakers and were used in the early Fender Deluxe Reverbs and alot of other great Fender amps. Though when i replaced the vintage Celestion G12K with this C12Q it sounded very harsh and trebly. I asked Fender if i could buy the one they use in their 65' Deluxe Reverb Reissue but they said the wouldn't. I guess it takes a while to break it in to get that warm sound that a vintage speaker would have, but right now i'm not blown away.