FiiO BTR3K Receiver Amplifier Bluetooth Headphone Amp High Resolution Support aptX HD/aptX LL/LDAC for Car Audio/Home TV/Speaker/Smartphones/PC (3.5mm/2.5mm Output)
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Saturday, Dec 6
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Features
- CSR8675 Bluetooth 5.0 receiver designed to deliver studio-quality sound through your ears WIRELESS - using your existing wired headphones, earphones or even speakers.
- For greater power independent Dual AK4377A DAC and detail resolution,the BTR3K features both balanced 2.5mm and single-ended 3.5mm outpts.
- Can be remotely controlled via FiiO Music app to switch channel balance,8 different DAC lowpass filter and 10-band EQ
- New Type-C connector with USB DAC functionality+11 hour of continuous pleasure at a full charge
- Bluetooth indicator light +Call up Siri in iOS+In-line Control(in headphones with CTIA controls, you can use the microphone as well as the play/pause, volume, and track selection controls)
Brand: FiiO
Connectivity Technology: Wireless
Controller Type: iOS
Special Feature: Microphone Included
Compatible Devices: Smartphone, Speaker
Connector Type: USB Type-C
Audio Output Mode: Stereo
Color: Black
Product Dimensions: 2.28"D x 0.98"W x 0.43"H
Item Weight: 24 Grams
Product Dimensions: 19.69 x 19.69 x 11.02 inches
Item Weight: 0.847 ounces
Item model number: BTR3K
Batteries: 1 Lithium Polymer batteries required.
Is Discontinued By Manufacturer: No
Date First Available: March 16, 2020
Manufacturer: FiiO
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Dec 6
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Dollar for dollar, the FiiO BTR3K has dramatically exceeded my every expectation! ...and I have reasonably high expectations... although not true audiophile. Oh, and it's sooo TINY. The build quality is amazing. Feels like a tiny little glass brick. I have this device paired to an LG V60 Android phone which fully supports all of the HD codecs like APTX HD and LDAC. I run the BTR3K in either APTX HD or LDAC (see below for a pro tip on getting this configured properly). Hanging off of this device are my 1more quad-driver, THX-certified in-ear headphones (best sound for the money, IMHO) with Comply foam ear tips for near-perfect comfort and sound isolation. Using the exact same headphones, the sound quality (especially in APTX HD or LDAC mode) rivals my portable USB DAC/Amp (a FiiO E18 Kunlun), maybe even exceeds it in terms of apparent clarity and soundstage. Of course, even in APTX HD mode, the DAC on this can only receive 48KHz, 24bit (essentially CD quality) data, so don't expect 96K levels of ultra-fine fidelity. That is just a limitation of Bluetooth bandwidth, not the BTR3K. As previously stated, the sound quality is amazing and, unless you are trying to drive really power-hungry cans, the volume levels are more than sufficient to cause hearing loss. A note here is that, unlike most Bluetooth 'headphones,' the volume control on these is completely independent of the source, at least on my LG. This allows you to run the BTR3K at lower volumes (raising the volume on the phone end) and conserve the battery life... which by the way is already amazing on its own! The included little holster is really well-made and allows you to clip it to your shirt to take full advantage of the built-in microphone. I am pretty sure that the BTR3K overrides the mic on my headphones. Just be advised that this little toy is HEAVY for its size and will drag down on your shirt collar. I place mine off to the side so that it is riding more on my shoulder/collarbone than dangling from my collar. That seems to work pretty well. PRO TIP #1 (see attached screen-shots): On Android 10 you need to modify your connection in Bluetooth settings (not the fancy developer-mode override, which requires a phone reboot every time anyway) to set the BTR3K Connection Type to 'Best Audio Quality.' This will give you APTX HD (if your phone or other source supports it) or LDAC. If your Android phone supports both APTX HD and LDAC, you will need to use the developer options to force LDAC if you want it. This is because Android prioritizes APTX HD over LDAC. You can tell which codec you are connecting through via the color of the little FiiO light on the BTR3K (when the source is actually playing). Yellow = APTX HD, Light Purple = LDAC. PRO TIP #2 (see attached screen-shots): If on Android, you absolutely should download the app called Neutralizer which allows you to set up each different headphone/connection combo to be as absolutely as 'true' to the music as your gear can handle. It uses a simple little hearing test, at various different frequencies, to allow you to literally 'dial in' the perfect balanced sound, regardless of how your headphones (or ears) were tuned from the factory. This is especially important as different codecs and DAC/Amp hardware can change the sound characteristics of your headphones A LOT. I have totally different profiles for my 1more's connected directly, via my USB DAC/Amp, and via the BTR3K. Same exact headphones. Three fairly different Neutralizer profiles. Sadly, I do not yet own a set of balanced headphones, so I can't speak to the fact the BTR3K has direct support for 2.5mm balanced headphone outputs driven by discreet DACs and Amps. I just have not been able to make myself spent the $1,500+ for a good set... yet. I do not doubt, however, that it can live up to that challenge. Just make sure that they are not too power-hungry. Anyway, hope this review helps. Happy Listening! - Matt
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Reviewed in the United States on January 3, 2021 by Me Me
I bought this primarily as a BT receiver over the factory aux line as P3 Volvos have phone but no music Bluetooth capabilities. At first I tried a Tunai Firefly dongle, but it was far too quiet (probably doesn't have an onboard amp or a lackluster one at best), sound quality was mostly muddy but just ok, and the ground loop noise was horrific. What surprised me is the Fiio module plugged into car usb and aux simultaneously has no ground loop noise! Probably due to it being a usb dac as well. For most people ground loop noise probably won't be a bother, but me personally I want the best audio experience while driving, and for only a few extra dollars this fits the bill excellently. I use the Fiio app--setting it in car mode so it powers on via usb when the car is started, on bluetooth receiver as default and on high performance dac mode. The sound quality is excellent and has wonderful symmetry with Volvo's factory Dynaudio high performance audio system. Certainly a better option imho over the more expensive dac boards made for aftermarket installation.
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Reviewed in the United States on July 7, 2023 by A.M. Shab
Good battery life, supports headset connection (it even detects my microphone from my Beyerdynamic MMX 300 and uses it without jeopardizing hearing quality!). However, if you're not connecting a headset, the FiiO comes with a built-in microphone that sounds way worse than 64 kbps (absolute garbage built-in mic), way worse than the iPhone's built-in. The fact that you have to turn off the FiiO to make sure you're not recording with it when doing voice memos, is very annoying. There's no known way to blacklist the built-in mic aspect of it. If you do voice memos, don't forget to turn off FiiO. FiiO, if you're going to deliver a mic that is worse than the phone's default, don't deliver it at all (-1). The manual isn't clear with what the led flashings and colors mean, so I had to put two and two with the patterns myself and whether it's tied with what buttons I pressed.
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Reviewed in the United States on July 11, 2025 by Fabián
I had a cheap USB/3.5mm Bluetooth pigtail for my car, it worked. This thing is so much more clear and powerful and LDAC / AptX support is amazing to have. Power and audio are well isolated. It has carmode which turns on and automatically connects when accessory is turned on. Fiio connect app has codec settings, EQ, carmode toggle, even turn off all the LEDs. Build quality is all metal and glass. Fiio knows audio, everything they make is quality.
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Reviewed in the United States on January 20, 2023 by Evan B
I don't trust myself enough to not lose wireless earbuds. With this I can clip it to my shirt pocket, plug in a regular wired set, and be content through my entire work shift. I have a iphone 12 Mini. This device reports battery status to the phone and you can view it in the status bar. This device also supports the highest quality streaming format that Apple allows on their phones (which they should honestly look at improving) so I know I'm getting everything bit of detail delivered out of my phone that it can supply. The pause button works well when I need to talk to a coworker. Note that the volume buttons only control the device's volume and not the volume you set with your phone's controls. This doesn't bother me, but its like having two layers of volume control. The "power on" "power off" voice indicator is not offensively obnoxious or loud. Note on leaving this thing in the sun: it must be due to how glossy the surface is or something, but it will get so hot you cannot hold it. I'm not kidding. I left it in my car on the seat once because I wanted to use it with my car's aux input. Came out later that day, picked it up, and nearly burned my hand. I didn't dare turn it on. Took forever to cool off. If I leave it in my car now, I leave it in the center console. Don't ever leave it in the sun. It still works great, but don't ever do that.
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Reviewed in the United States on July 24, 2022 by Spark Anthems