Rogue Audio Cronus Magnum III crackling static in left channel


This has been going on almost as long as I've owned the amp, 5 years.  I bought it new in 2021, so it's 2 years out of warranty, so no help coming from manufacturer.

I can stop and or aggravate crackling by wiggling the tip of the left 12AX7, less so by touching the left 12AU7. I've transposed the two AX7s and it helps temporarily. I don't suspect the AQ Evergreen cable or its connection to the DAC.

I've tried switching inputs to Aux 1, Aux 2 and CD, but the noise occurs in all three.

Any thoughts, suggestions welcome.

 

dreedbollinger

newbee + Mike B

Thanks!  I ever-so-slightly bent the pins, replaced, no crackling so far, even when nudged. Will eventually replace all small tubes with Au pins.

Btw, I emailed Rogue two days ago; not a peep so far.

Email them directly or call tomorrow morning. Don’t start bending tube pins or trying to compress tube sockets. I have a Had Inspire that I should have used tube socket savers and they’re loose as a goose. I do not get any static from them being loose. I asked Rogue once about a non response to an email and it was a result of how I sent it. I’m not co-signing a lack of response, but I have had fantastic support. One time I had Nick and the repair tech on speaker phone for 30 minutes as they talked me through some live diagnostics. Then I had a big pop without any damage and they said better ship it. They fixed my known issue and diagnosed a pending issue too. FWIT I had my M-180’s upgraded to Dark status and fully retubed last time in. Get your amp repaired and retube it. Consider a full or partial upgrade to Dark. PM me on the side and we can talk tubes. Also there’s a Rogue owners group on Facebook , I’m considering joining. [email protected]
 

You might also try cleaning the tube sockets with a bristled pipe cleaner and a tiny bit of DeOxit contact cleaner.