Questions for Rogue Cronus Magnum Owners

I recently purchased a Rogue Cronus Magnum III from a local dealer. They let me borrow their CMII to demo in my system and I fell in love with it. Their amp was lush, tubey, and romantic (as I've heard it described here on AGON). Perhaps somewhat syrupy. The new CMIII, however, sounds much more like the SS amps I've owned or tried. Kind of bright and sterile.

My questions is: How long do tube amps typically take to break in? Am I hearing 80% of what this amp will sound like after the break in period? Will it eventually warm up?

My dealer said that their CMII unit is bone stock. So I'm wondering why they sound so different.

Issue two is the hum from the phono stage. I experienced it while borrowing the CMII and it's no different on the CMIII. I went to the dealer today to troubleshoot the issue. Every TT we plugged into the Rogue's phono stage had an unnacceptable level of hum.

There is thread on another forum that complains about this same issue. Nick at Rogue has offered some good suggestions to resolve or mitigate the issue, but it still persists. Can anyone shed some light as to what the root cause may be?


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You already have the experts helping you. What more can you ask for?Rogue is a great company and makes good equipment. But fix it now while its early.
Get that hum fixed pronto.
In my experience with owning a Rogue and spending time at a local dealer, the earlier
components had a more tubey sound. Now most sound very neutral and clean as you describe.
I think out of the box you're hearing the sonic signature of this amp. As it breaks in, it will sound smoother, more dynamic, SStage and imaging will open up. I'm familiar with the original Cronus Mag and it had lush, yet accurate sonics.

Can you compare it with the Cronus II at the store (after burnin)? BYW, the 2 units may be using different brand tubes.