I have an MA333G-balanced that I have used for years with Cary 2A3SE monoblocks. It's a very good preamp and combination. Luckily my early MA333G uses standard volume pots, rather than the optocoupler volume control that was prown to failure in later versions of this preamp. For a time Melos Audio Restoration was servicing and modifying the old Melos products. There is a rumor about that Mark Porzilli may get back into that business.