Problems with my Berning ZH270

George,

The reason I asked about your rack and isolation tweaks was because I have found that small changes can have a large effect on tone (I have Merlin speakers with Joule gear).

Is it possible the Silestone quartz shelf is causing some ringing that is translating to brightness? One relatively cheap experiment is to buy an Ikea lack table (if you live near one) and put the tabletop without legs under the components, one by one, to see what happens.

Good luck, Bill

And one last thing George, if Allan hasn't talked you into the ERS as Khogugo notes, the cryoed 6jn6 outputs will move you up a notch but the ERS will just knock you out. It is the single largest improvement I have heard with this amp including various NOS input tubes, dampers, still points etc. The ERS really lowers an already low noise floor to allow you to hear further into the music. It sounds like you have your hands full for now but definitely consider this in the future, you won't regret it.

Thank you. Have you tried the 12AT7 Brimar black plates or the 12AT7/CV4024 Mullard CRYO ??. Would I have a warmer sound from them?. This is my first tube amp and I just learning. Thanks again.

George.
Please contact Andy at Vintage tube services, the RCA's seem to be the best bang for the buck.
Andy is the only other person besides David Berning and myself that have the perimeters of the amp and what the tubes require to be, Make sure you tell Andy it's for a ZH-270.

Hi Allan. How can I contact Andy?. Thank you.