Hi there,the "hotter" sound could be because of the "newness" of the recones.You've got brand new stiff cardboard versus 20-30 yr old soggy cardboard,old sub woofers get sloppy with a lot of use,the cardboard gets soft from working so hard,and then there's the storage.Sometimes speakers get damaged from improper storage,dampness,temp.change,etc.Cerwin Vega could have changed the voice coil windings,magnet gap,etc.,to make it hotter,the next time you get one reconed,go over the old one and the new kit with a micrometer and take some measurements to see if there's any difference between the two,good luck.Mel.