Fosi Audio DS2 USB C to AUX Headphone Amp DAC Dongle 3.5mm Jack Audio Portable Amplifier Dual Output DSD256 4.4mm Balanced High Resolution CS43131 for iPhone 15 Pro Max Plus iPad Android Phone

I'm an audio engineer and work in mixing and mastering for over 20 years. I have great dacs from rme for mastering and great headphone amps from different brands, all top of the lines.I was looking to have some portable DAC to use with my mobile and laptop when I wanna listen to music. I have Hifiman Ananda Nano, Hifiman He500, Neumann NDH30, Slate VSX, Sony MDR1A and other pro headphones. So I tried them all, using this Fosi portable DAC, and I was totally in shock. How is that possible? This amp sounded better than the headphone amp in my rme Babyface pro, and Audient Nero monitor station. When used with the Ananda Nano, OMG, it will feel as if I'm having a subwoofer. This thing makes my headphone vibrate without distorting even a touch. My rme distorts at around 60% volume onward.So I decided to master a song on my laptop using both the Ananda Nano and Slate VSX headphone through this Fosi DAC. I sent it to the client and was blown by his reply. He goes that was really fast. It's just perfect.I don't say it's the best DAC, but you can do serious work with it, with such a little price. My wife bought me this as a Christmas gift. I think this is the best spent money in my studio ever.

Brilliant device.Incredible value for the money. Can easily drive 300ohms cans.

Very happy, wasn't expecting this much clean power. Can drive my Aeon Noiree's to satisfactory levels in balanced mode before going into distortion.