Hello @kirkwallace, While I use a Puritan 156+ power conditioner / surge protection for my digital equipment, I have always plugged my amps directly into dedicated 20amp outlets. Your experience of throttling dynamics is consistent with many peoples findings, including my own, with many different power distributors, Not counting plain distributors with pure high quality outlets, but these offer no protection. My digital is in my office, and at my stereo I also have a Shunyata Denali V2 which I use for my Streamer , DAC and Preamp. I do hear an improvement with the Denali, but Amps are straight to the wall. I'm good with this, no direct surge protection on the amps, but understand the desire for protection. My amps have had a surge or two and they immediately go into shut down (Audionet). I also had the electric company instal a whole house surge protector, outside on my meter. I've had some big thumps without that tripping so not sure if it really helps sensitive equipment or not, but I've also never had damage since it was in. I think the digital / computer stuff needs protection more.
I would expect the Furman to limit dynamics, but you never know. Go for it if it is returnable and give us a report!