I was always concerned that I was living on the edge, driving my Koetsu Rosewood directly into my ARC SP 9 MK II, as I had to use it with the gain set at at least 3 o'clock. I was convinced that the Koetsu was running out of steam.
Then I came across two tiny Beyerdynamic microphones on eBay for $100 the pair, so I bought them and built a step-up transformer using them. Basically bought a case and connectors, and put them all together.
I did indeed have a problem before. There is no gain problem anymore; my system came alive at once. The Diana Krall LPs are indeed magical. I do, of course, have that LC1 providing power.