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Diners who had aged out of late-night dance parties, like the ones where Mr. Murphy used to spin records, could drink a chilled Brouilly while listening to his favorite albums played through a vintage McIntosh preamplifier he’d bought on eBay.

For USB-based recording using older turntable systems without the headphone jack or line output, you’ll most likely need to include a separate phono preamplifier box to boost the audio signal as well.

When they closed more than 10 years ago, I was able to buy my vintage preamplifier and some mixing equipment at their online sale.

This past July, the room was dominated by a computer and a vocal preamplifier.

“Deadheads who are uploading stuff to archive.org are including every tape deck, every cable, every microphone, every preamplifier.”