I have been using a Peavey EuroSys-3 15" cab along with my combo for a few years.
Last time I used it, it started producing a huge buzzing sound during sound-check.
I haven't gone near it since but recently picked up an Eminence driver to replace the one in it.
Anyway, before I did that I tried it out to see what sound it produces. No buzzing but very low power output.
I installed the Eminence and found no difference.
I have run both speakers in a different cab and they are fine so it appears some other component in my Peavey cab is at fault. There is a small component that looks like a transformer inside but not much else.
I like the cab cos it gives great bottom end when working and importantly, fits in my car..
Any help or a pointer in the right direction would be much appreciated.