Living Voice for Shindo?

I run my IBX R2's with a 24watt 300b amp. Living Voice suggests at least 20 tube watts. I never run my amp more than 1/3rd throttle in my 20 x 12 listening space. I don't think you'd be getting much out of your LV speakers with just 15watts, however.

I'm using the Mastersound 300b PSE integrated amp. Four power tubes for a rated 24 watts.

I've exchanged emails with Living Voice and the least they recommend is 15 watts. They suggested the compact version of the 300b Mastersound or one of New Audio Frontiers offerings.