I have 4.6 which is supposed to be best of 80's gear hooked up to their Delta 100 amp as second system.Very good and considering it cost $1600 fro amp and $800 for pre it's great gear.Think of what they would charge now for same gear.If you have wall wart power supply you might want to send it to technician for new Power chord (don't spend too much) and since it the age it is get it checked out and cleaned.Hopefully you capacitors are still good and they should be checked.But other wise it's good gear at great price.
Cheers
Chazz
Cheers
Chazz