Review on 🎧 Fosi Audio N2 Headphone Amplifier: Portable Amp with 3.5MM Gain & Bass Switch for HiFi Earphones - Powered Dual-Output, Compatible with iPhone, iPod, iPad, MP3, and Computers by Jonathan Bennett

Exactly what I was looking for to make listening to streaming music on iPhone or iPad louder! Got the N2 amp and immediately noticed the weight and quality. Unlike most modern cheap and plastic things. It is metal and feels like a quality product. I've tried it with multiple headphones and made each pair sound louder while maintaining the quality and difference in each, which is what I wanted. For example a gain and bass switch so I can control them depending on the music or headphones I'm using. My package was missing a charger and 3.5 cable, but the support team quickly rectified this issue. Great product, great customer service well worth the price.