Calling all Marantz Ruby owners

Thank you for this information. I've wanted to try Spendors for some time. Glad to learn of a positive experience.

I've since sold the Marantz PM KI Ruby and moved to the Denon PMA A-110 anniversary integrated with my KEF LS50 Metas and really like this pairing.

All the best! 

I realize this was posted quite some time ago, but I’ll provide my answer anyway. I use my Ruby pair with Spendor A7 speakers. I think they sound great. 

Marantz pair well with Wharfedales...I ran a pair with a Marantz Pm14s1 integrated and to me it sounded great. I'm hanging on to my 14s1, as it was the last class AB integrated made by Marantz. Your Ruby, although very nice I'm sure, turns me off being a class D amp.