Can the output of an ARC PH-7 be turned down?

Thanks to all for your input. ARC has a gain reduction kit I can get, but they discouraged it due to signal degradation. I saw where MCM electronics has line attentuators, but I would have to use an RCA to XLR adator on my interconnects from my PH-7 to the Calypso. Does anyone have any experience with these? I checked with Vintage Tube Svcs and they have the 5751 tubes, but only in RCA. I'm wanting a rich, warm clean and clear sound. Anyone have experience with these tubes?

I was thinking and the 5751 tubes will reduce my output, but not my input (I think ). I think I will try to get a couple of -10db attentuators from Rothwell as suggested by "Mofi." To be fair, he did suggest a lower output cart over the attentuators.