Mass, unless you're just going to sit there and watch your new speakers instead of listening to them, you've got to try something. I have no idea whatever what protective circuitry, if any, JVC receivers had 15 years ago, but frankly I would take a chance to try and find out. Start out at low level and see if the receiver gets hotter than with whatever speakers you've been using up to now. If not, increase the level and check again,etc. I assume that you don't have a JVC manual which might discuss the situation.
