McIntosh amp opinions?

Hello all and thank you for the responses, The amp is indeed a MC2205 solid state. I have pics on my system profile.
The Cardas cable change was one set of RCA interconnect. From CD to pre-amp. I had previously used a complete set of Transparent (mid-level) cables all around including speaker. I noticed an immediate extension is bass response that I had never hear before, but ironically some dullness in the top end. That was with using a combination of the two brands. The best results believe it or not were to eliminate the transparent cables and use just the Cardas with some cheap cables connecting the pre to amp. The all transparent cables sounded great mind you but the mix of the two was not good and in the end much better with the Cardas. I will be looking to ad more cardas next.

Also....the amp has as stock a zip cord sized power cable and speaker binding post that are very small. I would like to keep the amp and improve these two areas as well as any internal upgrades. Has anyone ever done this before?

Dont do it.Dont ask why.No guarantee you'll notice and you will wreck a nice amp,YMMVBIDI

Dont do it.

I agreee . . . you will find VERY, VERY few modifications done in this manner that aren't complete butchery of a nice amplifier. Resale value will go down as well.

I'd wait til you get it back from being serviced to make a decision on getting a new amp. It may sound like a new amp to you. At 30+ years old, it was probably getting weak even before one channel went south. It's a great amp. I owned one for many years.