Mccormack DNA-225 platinum

@mzwerner - WOW! I am running a similar system to yours. I have a pair of cloth Quatros I picked up just shy of a year ago, and had a DNA 0.5 GOLD upgrade done by SMcAudio this last April 2018, both a tier shy of a DNA225 Platinum and Vandy 5's. The sound is amazing. You happened into a wonderful combination KEEP IT!

The only problem with that equipment is, it shows you everything, good and bad. You will now be able to more clearly hear differences in cabling, source, etc., which can be good and bad. I liken an amp/speaker combo equivalent to a window... you just got some very clear windows, great stuff looks GREAT, and things you believed might have been good when you didn't have clear windows don't look that good now that you can see it more clearly. An example is, I have 2 SPDIF/Digital Coax cables, a Monster Cable, and an MIT. When I listened to them on my old B&K ST-202/Vandy 2C combo, I believed the Monster Cable was a better cable. With the DNA-Gold/Quatro combo, it was "clearly" obvious the MIT is the better of the two cables. It can be very disappointing to find out that some of these ridiculously priced cables, etc. actually do sound better.

@Kmckenn - just replied to you on the other thread. But, wow we do have nearly twin systems. 

So far at least everything sounds great or at least better than my old setup (which I also loved) I have some cheap monster cable. The Mccormack came with an anticable 3 power cable, which I'm using. I also have some extras that came and didn't fit on the vandy subs so I'm just using stock power cords. Should I get an adapter for them to work with the vandy's or sell them and keep stock for the vandy subs? 

As far as cabling goes, I would recommend Audioquest.
AQ and Vandy just seem to work hand in hand. In fact Mr. V. uses AQ for internal wiring of his speakers, as well as the pigtails on the crossovers.
Bob

Garage sale find of the year!
Since SMc already confirmed it you know it has been upgraded but you might also pop the top and look for writing on the underside since Steve typically signs and dates all the upgraded pieces.  If you post a picture of the inside, folks here can probably chime in on much of what has been done.  

If you haven't seen this;
https://www.stereophile.com/solidpoweramps/545/index.html

@gdnrbob - Audioquest cables it is!

@mitch2  Thanks so far the amp and the speakers sound amazing. So I'm a happy camper. 

Steve signed the back that's how I found out the 225 was platinum. I'll check the bottom tonight. 

attached is a link to a bird's eye view of my amp:  https://www.pinterest.com/pin/668573507159022166#