I agree with others, the Gram Amp is a piece of junk, I tried it and immediately knew it was junk so I sent it back.
Instead got the Schitt Mani and it sounded better than not only the Gram Amp but that's no big shake because that Gram Amp would have lost to any $20 preamp, but it also sounded better than my old Cambridge.
One of the comments cut down the Schitt Mani saying it didn't compare to the Rega Ari...Duh! Really? You're going to compare a $1,500 phono preamp to a $150 one, then call the $150 one bad?? (Insult deleted by moderation) That is like comparing a Bentley Flying Spur to a Honda HR-V, and then saying the Bentley is a much better luxury car!
I would like to do a blind listening test of the Rega Ari to the Schitt Mani, I bet the difference isn't worth $1,350 more money, but some people think they hear the difference, like they think they can hear the difference between $1 a foot speaker wire vs $1,000 a foot wire, they can't hear any difference because there is none, test have been done to prove that fact, and no one has ever taken anyone up on bets that they could hear the difference.