I’ve never had a DAC/AMP before because as far as I know, I’m completely fine without them, I’m curious and would want to start somewhere cheap so I know whether to add them to my set and if the benefits are good enough to warrant an upgrade.
edit: if a decent sub $50 exists, I might go for that first
Are you pairing it with IEMs or headphones? IEMs have plenty of options that have already been mentioned. I have a Truthear Shio, easy plug and play without all the bells and whistles of other ones.
If you’re using headphones you would have to consider if the dac/amp could power them good enough though.