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Opera Consonance M500 mkii
Opera Consonance M500 mkii
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Old 14th January 2011, 09:48 PM   #1
Pahstv is offline Pahstv
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Join Date: Jan 2011
Default Opera Consonance M500 mkii


Need some help/advice.....

Have just received a set of above tube amps and was really happy until i noticed a slight hum from both amps (both of them) and the speakers.

At normal listing level it is not noticable, but I know it is there which is a pain...

Without the tubes there is only a very very slight hum from the amps (transformers i assume) which increase graduently as i install the tubes.

Any ideas on what i can do to overcome this issue? Previous owner claims the amps have benn running for approx. 100 hours.


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Old 15th January 2011, 11:21 AM   #2
singa is offline singa  Singapore
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Hi, this is usually a grounding problem that is the amp has aged and
ground wires attached by eyelets with screws to chasis and similar
wiring and solder joints.Inspect them carefully for bad joints and loose parts.
Hope this helps.
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