The ARC PH-7 has a fixed output of 57.7db. You could try some in-line attenuators or a different cartridge with a much lower output.
Can the output of an ARC PH-7 be turned down?
I just purchased almost simultaniously an ARC PH-7 and an Aesthetix Calypso. I'm finding the "7"'s output is overdriving my Calypso-at least that's what Aesthetix thinks. Try as I might, I can't find any jumper or adjustment to the 7's output. Any suggestions?