comparing the sound to the sound of a CD of the same music. if it doesnt measure up, then soundsmith is the answer. in the meantime you could snag another cart like a grado black or at95e or ortofon 2mRED. all affordable and its not a bad idea to have and extra around for dry spells. having an arm with detachable headshell is beneficial.

theres no way on this forum to list equipment easily. my system is here:

http://cgi.audioasylum.com/systems/588.html

i too have an f9e or two and its one of the most endearing sounds.