Better to not replace anything and let it be all original. So it is best to have it service by a qualified technician and replace parts as necessary. This unit was manufactured in early 1960. Nearly made 60 years ago and still looking handsome.
Please NOTE - the aluminum plate cover for the tubes is missing unfortunately. Beyond that all is good. Thank You and Good Luck :. The item "McIntosh C11 Tube Preamplifier All Original With 6 Telefunken ECC83/12AX7 Tubes" is in sale since Sunday, May 17, 2020.This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Preamps & Tube Preamps". The seller is "mono" and is located in Fairfax, Virginia. This item can be shipped worldwide.