I am the original owner of a 140/106 (2x15)and the speakers in the 106 are original--they are not blown, torn, loose dust caps or anything. What do I gain by replacing the speakers with brand new speakers? Will fresh speakers sound better/different than 30 year old speakers? The current tone I would describe as a little "brittle" or "honking"--would new speakers help give a "smoother" or more "rounded" sound? (sorry I'm struggling for descriptive terms!) I also read a previous thread on replacing speakers in a 406 cab and apparently the original equipment was eminence ( I thought CTS?) I guess the inverese of my question applies also--should I keep a 30 y.o. amp original--as long as everything works fine?