I've had a lot of experience with all sorts of A/C power cords, connectors, outlets, fuses. One thing I have found is that amplifiers are, generally, less sensitive to elements/changes on the A/C line -- when compared to preamp/source equipment. That doesn't mean that A/C upgrades won't help amplifiers -- they definitely will.
That being said, it looks like you have an un-plated copper outlet on your amplifier and are using the Gaofei Rhodium-plated for your source equipment. I would move that Gaofei Rhodium over to the amplifier outlet (or just switch which outlet your amp is plugged into). I would use the Furutech GTX-D Rhodium for the preamp/source equipment. I have found that Furutech puts a lot into their plating and metallurgy with regards to how the item will sound. It's definitely expensive, but it's worth it for the subtleties that Furutech can reveal.
Be prepared for a 250+ hour burn-in time for the Futurech Rhodium plated stuff before they sound their best. It may get really bright/harsh between 100-200 hours (be patient!)