How to duplicate Tapes flawlessly so that they sound the same as the original

I own ~500 tapes, half have been digitized to share across my devices so I can listen to cassettes on the go or at work. I know how to duplicate tapes, but I’m wondering what equipment I would need to duplicate a tape without any loss. Modern tape players/boomboxes have such poor quality. I’d like to own a piece of legit vintage hardware.