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Phono grounding when using integrated w/ floating ground?

I use my integrated's phono stage. The amplifier is a floating ground design (no ground prong). My turntable has a 3 pronged plug. The outlet everything is plugged into is grounded. My question is thus:

Should I use the grounded power cable for my turntable, or buy a 2-prong power cable? I wonder if issues could arise if I ground the TT to earth *and* to my integrated? Conversely, I could ground the TT to earth and forgo the ground wire to my integrated.

What is considered best practice here, or should I just experiment? Thanks!
lostark

Showing 1 response by noromance

noromance's avatar
noromance
9,470 posts
 
So your integrated is grounded,
Not necessarily. If there is no chassis ground, and the live and neutral are isolated by the power transformer in the amp, then there is no safety ground or direct path to true ground. The manufacturer has ensured the amp is double insulated and does not require a safety ground.
In your set up, the amp would be grounded through the turntable ground wire only; thereby ensuring no ground loop.
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