FiiOBTR15 Headphone Amps Bluetooth 5.1 Receiver High Resolution 384K/32Bit Native DSD256 USB DAC Supports LDAC/aptX HD/MQA for Smartphones/PC/Car/Home Audio (Black)

This works fantastic with my Macbook and iPhone. I use it when I travel to run some IEMs and have had zero issues with it. If you have hi-res music files or stream from Tidal or other hi-res services then I would highly recommend this DAC/Amp. Sure running headphones directly out of your PC might sound okay... but if you want more then you'll need something like this. And this was a great place to start.I have not tried the bluetooth mode. I don't think the point of this unit is to use it as a bluetooth receiver, but I am a beginner audio snob, however I'm positive it works just fine.Pros: Simple and starts up quickly. Volume rocker is responsive.Cons: Would like a braided USB-C cable with it. Also, the text showing PC Mode, Phone Mode and Bluetooth is very small and the screen does not always notify properly when switching between modes, BUT the different modes work fine.

I've been an audiophile for many years and I've owned multiple sound equipment where each piece can cost thousands of dollars. I've tested this device with Fiio FH9, Beyerdynamic DT990 Premium and HIFIMAN HE1000 v2 earphones. I've compared it against Fiio X7 player, Fiio BTR7 and my desktop external sound card xDuoo TA-10. The sound quality is very, very high and it's very difficult to find any gaps compared to much more serious and expensive devices. I think 99% of people will not be able to hear the difference between this device and much more expensive devices.I've used this device extensively, every day, multiple hours during my vacation and in the last few weeks. Found 0 issues.I love the case clip, so convenient. I could use the clip to attach it anywhere so I could very quickly to access it to pause, or resume, or change volume, etc.The power output will be enough for all earphones and lower impedance large headphones. It can even be fine for 250-300 Ohm headphones if you don't need a very high volume. It will struggle with 600 Ohm headphones though. The power output is lower than on Fiio BTR7, Fiio BTR17 and much lower than on Fiio X7. But Fiio X7 is a beast that beats many full-size desktop sound cards, so you can't really compare it to Fiio X7. But just for reference.Absolutely love this little device.Highly recommended.

I was looking for a dac/amp to get louder volume on PS5 and while yes this device technically works it is actually a quieter output than if you just drive your headphones with a controller. Per Fiio it is an issue with the USB audio output on the PS5. Other mfgs have been able to bypass this but Fiio doesn't seem interested. If they ever introduce a firmware update I'll update this review. PS5 Pro does not seem to be affected with this usb audio issue(anecdotally).PS5 issues aside I absolutely love this little thing. I work from home and can have it simultaneously connected to my work pc and personal computer/phone via Bluetooth and if I get a call come in from work the device will automatically pause whatever I'm listening to and switch to work call and once the call is over will switch back an unpause the music/video on my personal pc. You can answer and end calls all with the device too.Audio wise the output is very clean. I definitely notice better detail on music than without it. Having the eq options is nice as well. Even though it didn't fit my original planned use for it I am keeping this item as I enjoy it so much for everything else.

Tl;dr: Connectivity issues, battery life issues, poorly-implemented wired functionality, poor battery life even after firmware update, lacks features compared to BTR5. Spend the extra $50, or spend $20 less.I purchased the FiiO BTR15 a few months ago, and it's been my daily driver for audio since then. I purchased the device to replace my BTR5, which I thoroughly used to destruction and beyond. I loved the BTR5, but it fell short when playing heavy orchestral tracks (instruments seemed too close, definition was muddy/lacking compared to other DACs).So, with the BTR15 competitively priced and marketed as an upgrade to the BTR5, I purchased it after reading reviews praising its improved resolution over the BTR5. While these reviews were accurate, they left out several significant flaws that make me regret my purchase.1) Connectivity problems. The Bluetooth regularly and randomly loses contact with my phone, tablet, or any other Bluetooth device. For example, when I'm walking down the street, my music will suddenly stop, the device will disconnect, and then reconnect. Sometimes it fails to reconnect entirely, and I have to do it manually through the Bluetooth menu.2) Do not use this DAC with multiple paired devices, you will regret it. If you have two paired devices playing audio at the same time, they will conflict and fight, causing horrible aliasing and distortion. It also IMMEDIATELY begins communicating with everything it can in range, exacerbating the issue.3) the battery life is poor, relative to the BTR5. I suspect this is due to the changed internals; the 15 apparently uses a more conventional amp design than the 5. Running a pair of etymotic er2se's, I'm lucky to get 4 hours of life listening at volume 12, even with the firmware update.4) poor wired connectivity. When using it in PC or phone mode, just bumping the cable even lightly causes it to lose its connection, and if you're using the FIIO music app, the app will require fresh permissions to resume audio playback.5) It lacks several key features of the 5, namely the filter settings. The 5 has several low pass options more; slow, apod, apod 2, and brick come to mind. I always used slow for my filter settings, so to find it missing from the 15 is disappointing.While the audio quality is quite good, and certainly better than the 15, the loss of features and battery life do not justify the increased expense. This product is bad value; for my requirements, the BTR7 is a far more compelling option, and for the average consumer, I feel the BTR5 is far more compelling proposition, especially since it has 2x the battery life, from my observations. It is neither fish nor fowl, neither a mid-range value product nor a low-range entry product, and I suspect it is actually cheaper to produce than the 5 due to the loss of features. Avoid this product, and buy the 5 or 7.