F fezz Member Joined 2002 2003-02-10 10:25 pm #1 2003-02-10 10:25 pm #1 ive started upgrading my old Rotel amplfier - out of bordem more then anything, but have noticed that it has a 4558 OA - can it be replaced with a better chip like an OPA2604 without any mods?
ive started upgrading my old Rotel amplfier - out of bordem more then anything, but have noticed that it has a 4558 OA - can it be replaced with a better chip like an OPA2604 without any mods?
