Epiphone Firefly 30 DSP hum

[DrLev]

I will have to rewrite my last post as it doesn't display properly on a phone.
It was perfect on a laptop.

Q34 B-E -437MV
R321 0MV
Q36 B-E +543MV
R320 1.3MV
Speaker 21MV DC 9MV AC


Q34 B-E -592MV
R321 3MV
Q36 B-E +573MV
R320 4.5MV
Speaker 23MV DC 12MV AC


Q34 B-E -612MV
R321 11MV
Q36 B-E +588MV
R320 12.3MV
Speaker 22MV DC 20MV AC


Q34 B-E -625MV
R321 22MV
Q36 B-E +600MV
R320 23.1MV
Speaker 25MV DC 30MV AC

[g1]

Those readings across the speaker are within what is considered the normal range for hum in a guitar amp.  Are you using it in a particularly quiet environment?  Do you have other amps you have compared it to?

[DrLev]

Thank you for your reply.

This amp belongs to someone else who insists the hum came into it recently.
To me it sounds a little noisy.I have heard quieter ones.I don't know anyone with the same model to compare.
I guess I will just have to give up on this one.
Thank you for all your help.