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[email protected] palli...@gmail.com is offline
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Default Where does the hum come from?

John Dope wrote:
==============

With the powered speaker (JBL LSR305, -10dVB, volume maximum) input
disconnected, with its speaker wire dangling from its input, there is almost 0
sound from the speaker except an extremely faint wind sort of sound with my
ear up against it.

Humming begins when the speaker wire is plugged into the disconnected DAC.

** There is no "speaker wire" involved.

What you have is an RCA signal lead - get the name right, you arrogant ****head.

Some cheap RCA leads have little or no shielding, so try a good quality one and you problem may disappear.

....... phil