My New Manely Steelhead

I just received my new audiogon Manley Steelhead preamp. I let it warm up and I checked the tubes to make sure they were seated properly. I put it into the rack and turned it on. Lights are always a good sign. I turn the knob to MM and 47K for my cartridge Grado The Statement. The only settings I know to change. I played it for a couple hours thinking this sounds dry analytical. It did not have any life. I switched from a ARC PH3 and I was missing the romance of the PH3. The Manley does top to bottom better but lifeless. I looked at the Manely thinking what am I going to do. Sell it, but I just bought it. Then I noticed the gain setting was on 65. I changed it to 55 and immediately the sound stage grows wider and the music comes alive. Wow I just wasted 2 hours. The PH3 is now going. What a great unit. I hope nobody else makes the same mistake.