12 Best Portable Headphone Amplifiers (August 2026)

I still remember the first time I plugged my Sennheiser HD 600s into a $5 Apple Lightning dongle and felt nothing. The midrange collapsed, the bass went floppy, and my 300-ohm headphones sounded like a pair of cheap earbuds. That frustration sent me down the portable amp rabbit hole, and over the past two years…