Don't think recapping the PS would do anything.

Maybe there is a broken trace somewhere in the signal path between the sockets and the amplifier. I'm assuming that you have tried the line in-socket?
 

Hi,

Sorry to disturb you but I've founded your commentary trhough a google search and I'd like to ask you with what kind of cable I can plug my IPOD directly to the BEOLAB PENTA amplifier. I  bought a 2 RCA cable joined to a powerlink (5 plots) connection but it doesn't work with it !? How do you do it ?

Thanks in advance

Henri

The Penta transformers are underrated for the amp capacity and are known to "expand" over time. There was a thread on here showing the state of the box inside and the hum seems to be a tell tail sign.

Search the forum for "Penta bookmark this" thread and read. Good luck.

I don't agree.
The idle current trimmers are what fails.
They lose connection, making the amplifier idle current way too high, almost Class A.
The transformer is not dimensioned for Class A, it will introduce hum and it will become hot and
that in turn affects the capacitors that sits right next to it.

The photo of the meltdown is a typical example of an owner unaware of the condition of the amplifier.
It would have been really hot and the smell would have been really bad to get to this state and
still it was obviously left powered on.

Martin

Henri,

Welcome to Beoworld !  🤒

Please put your question on the general forum as a new thread. This thread is about the power supply of the Penta speakers and
may not attract the people who can answer your question.

Martin