the choice is to either sit in the lab listening to silence, or take the headphones off and listen to the hum of all the computers, air handlers, etc

Or... you could connect a wireless headphone setup to your empeg, sitting safely and "legally" on your desk, and listen to your empeg up to 300 feet away.

Would that work, or is your lab too great a distance from your desk?

tanstaafl.
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"There Ain't No Such Thing As A Free Lunch"