Hi, Happy End. :clap State of affairs: Yesterday I picked up the amp and now he appears to be running properly within its capability. "Within its capability" means that the rattle is not completely gone. But you have now already about 20 - 30 cm be directly to the ear at the level of the Cabinet / S...

Hi, Update: The problem may be solved. :clap It was probably due to the rectifier diodes in the HV power supply. They spread their "switching frequency oscillation" in the HV which you see can very well on a high-resolution scope. An exchange of the diodes has corrected this problem. Well known unde...

Hi, quick update (THXfor it!): I am gone from the send of the 2266VM in the return of my Bugera V55, to test the basic behavior of the 2266VM preamps, as far as possible. The 2266VM I have not connected to ground to avoid a ground loop (which there would otherwise be). Result: A quiet, totally buzz-...

Hi,

Yes, the power supply is properly grounded. The amp has on each power socket this problem.

With best regards
Michael

Hello, this is my first post here. I write in from Germany, i hope my English is understandable (Babelfish Translator). I have a Marshall 2266VM bought used. Unfortunately, now it's clear why it is so cheap in price... The amp has a problem that I will describe here: On him just a cabinet is connect...