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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

That is a good idea.

Also, install 75-ohm shorting plugs on any unused input jacks.

Depending on how far you want to go with modifying the preamp, you could use the old Hewlett-Packard trick of diode offset for the safety-earth connection. Together with some low-value, high-current inductors, this should provide an RF barrier while maintaining a semblance of third-wire protection.


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