Fosi Audio DS1 Portable DAC Headphone Amplifier with ES9038Q2M Chip, Supports PCM 32-bit/768kHz & DSD512, 3.5mm & 4.4mm Outputs for Hi-Fi Audio, USB DAC Amp for Headphones

Turns your phone into a first class audiophile streamer. Match with a good pair IEMs like the Truthear Crinicle Reds or the Hexa and you have a budget hifi that people spend thousands of pounds to achieve. I have both and I just love the sound.

I have to admit I've been on a quest to find one of these DAC/Amps that actually delivered on the hype. I've been through Moondrop/Fiio/Tanjem et all devices and I've found their Achilles heel sound quality wise. I want a device I can use whilst rowing, but also one that can power full-size headphones (some high impedance) as well as low impedance/high efficiency IEMs; I did initially give up and built my own Frankenstein setup comprising a Topping NX7 and a used Arcam rPac which I obtained from eBay and did a little refurbishment/maintenance on (re-soldered the input jacks as they inevitably succumb to the primary plug/unplug stresses). The sound of the NX7/rPack combination is particularly convincing (almost holographic, even for headphones) when connected to a pair of Quad ERA-1s, with fabulous dynamic and slam, where present.However the NX7/rPac combo is hardly something that could be worn on the belt whilst rowing and more lends itself as a travel DAC/Amp combo that one would take on holiday or on a business trip. Then I read about these in the esteemed New York Times (and also the usual FoTM ravings on YouTube) so purchased the with cynical view as to what I would hear. Well, surprise, surprise, whilst not having the transparency, refinement or outright slam of the Toppong/rPack, the Fosi presents a shockingly good rendition of the music presented to it and and is a good 70-80% of the Topping/rPac combo. So, I highly recommend this little device for serious listening with good headphones. One YouTuber mentioned this could replace a desktop amp/DAC to which my reaction at the time was "BS", but I think, at a pinch it probably could. I'm still going to use the Topping/rPac/Quad combo for travel/holidays, but for walking around town, or going to the gym, this little DAC/Amp, IMO, is as close to a true hi-fi experience you're going to get on the move (with the right headphones/IEMs of course).

Great sounding device, a bit like a Helm Bolt, but much better value.Would have given 5 stars, but for the cable becoming defective and so device didn't work.The good news is that the cable is easily replaceable. Brought a quality cable replacement and now the device is now working again.Company needs to address the weakness in the design of the cable, as the device is excellent otherwise.

I don't have the musical terminology that a lot of reviewers seem to to be gifted now days, so I'm not going to say stuff like sound stage, bass, mid bass and treble textures, etc,etc. But the one one good thing I can understand and share with you is that this small little device can make my iem rock! Forget all the flashy expensive versions, if you want your smartphone and music streaming services to sound good with a decent set of iem look no further. £75 well worth it.

Very good price, no gimmicks and just works with S25 ultra and hd650 headphones.

Tested for 2 days now and am loving the details and clarity it offers. Listening to music ( streaming and lossless files )via phone through my headphone(px7 cable) or as aux to car and portable speakers with all EQ and sound enhancement off, am enjoying music like never before. Its my fav purchase now. Definitely worth the money.

I returned this item. It is well built, works flawlessly and doesn't heat up with use. Unfortunately, I found the sound signature too "in your face" for my tastes and fatiguing to the ears resulting in me needing to take breaks after a short amount of time listening. I will be searching for something that works just as well but is kinder to the ears.

Doesn’t work with lightning to USB as stated in ad. It may well be a good product but no use to me at the moment.