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FIIO BTR3K CSR8675 LDAC AptXLL Portable Wireless Bluetooth 5.0 Audio Receiver HiFi Headphone Amplifier


Balanced output

Supports Bluetooth 5.0

High-performance AK4377*2


Supports LDAC/aptX HD lossless Bluetooth codecs

Captivating you through your fingers Silky smooth surface

The aluminum alloy body wrapped elegantly in an arc of 2.5D glass like that used in the latest smartphones, the oleo phobic coating that keeps off fingerprints, the high contrast black lettering and the smooth texture give the compact BTR3K an elegant look that would not be out of place in a specialty artisan's shop.

Now with balanced and SE output incredible performance gains

Building off of what made the BTR3 so good, the BTR3K implements balanced output. It is a truly balanced design, with a DAC and amplifier carefully paired for the left and right channels each, for the purest sound possible.

Robust, full-bodied sound high performance AK4377A

With two high-performance AK4377A DACs, the power output has increased by 50% compared to the AK4376 used in the BTR3 as well as greatly improved measurements and actual sound.

* -107dB distortion, 122dB S/N ratio, 78mW output power balanced, 25mW output power SE.

Independent dual crystal oscillators for accurate audio reproduction

The dual crystal oscillator system in the BTR5 also comes to the BTR3K! The 22.5792M/24.576 MHz dual crystal oscillators mean that during Bluetooth and USB decoding, the BTR3K can more accurately reproduce audio signals under various sampling grates-due to greatly reduced jitter and greatly increased audio stability.

A robust inner core Qualcomm CSR8675, flagship-level Bluetooth abilities

The Qualcomm CSR8675 Bluetooth chip used in the BTR3K is a premium low-power solution designed for enhanced audio applications, with a 120 MHz DSP, support for 24-bit transmission and processing as well as abilities to decode multiple lossless Bluetooth codecs. No matter whether you watching videos, listening to music, or enjoying your favorite game, this chip will ensure you get excellent sound quality.

Speedy Bluetooth connection

The BTR3K upgrades to Bluetooth 5.0, which means faster pairing and more stable signal strength for a better overall experience. It fully supports AAC/SBC/aptX/aptX LL/aptX HD/LDAC audio formats that you'll get the best sound quality possible from the BTR3K.

An extremely useful little light

With so many Bluetooth formats being used in various places, the RGB light indicator quickly tells you which format is currently being utilized.

*Blue light: SBC

*Cyan light: AAC

*Purple light: aptX/aptX LL

*Yellow light: aptX HD

*White: LDAC

Listen and charge with Type-C

You can listen while charging with the USB Type -C connector. As a matter of fact, the BTR3K takes only 1.5 hours to fully charge but allows for a lengthy 11 hours of playback!

Crystal-clear calls free of noise

The built-in amplifier in the BTR3K not only ensures your music sounds good, but that your calls do too. To further enhance your calling experience the BTR3K is not only equipped with omnidirectional microphone and phone controls, it is also equipped with the eight generation Qualcomm's cVc noise cancellation technology, which effectively suppresses background noise so that your call comes through as clear and audible as possible.

Flexibility specialist adapts to various kinds of wired headphones

The BTR3K can automatically tell what kind of headphones you plugged into it and adjusts its output accordingly. And when you plug in headphones with CTIA controls, you can use the microphone as well as the play/pause, volume, and track selection controls.

Great connection convenience Supports pairing to 2 devices simultaneously

The BTR3K can be paired with and remember up to two Bluetooth devices at once, allowing for even more convenience. Simply use whichever device you want to pair the BTR3K anytime without hassle!

Quick and convenient volume control

When you connect the BTR3K to your Bluetooth device, the device's volume and the BTR3K's volume can be adjusted separately, allowing you to better fine tune the volume to your needs. The BTR3K also remembers your desired volume, so you don't have to adjust the volume to where you want it every time you use the device.

Give a holler when you need help

Simply use the BTR3K to call up your smartphone’s assistant without even having to pull it out.

Intelligently puts your music at your fingertips

When your device is connected to the BTR3K and is using the FiiO Music app to play music, the BTR3K can be remotely controlled with the following functions.

Free to go with you wherever

You should be able to take your music with you wherever. The BTR3K comes with a symmetrical, detachable rear clip that allows you to easily carry it around.

Use it everywhere

1.      Get your music on the road

The BTR3K supports a car mode that allows you to easily listen while driving, so you can enjoy great music during every trip!

*When car mode is enabled and the USB cable is connected, the BTR3K will automatically turn off and on along with the car.

2.      Give your older speaker new life

What if your great-sounding older speaker doesn't have Bluetooth? Don't let it go to waste - simply connect the BTR3K to the 3.5mm jack of the speaker, and let the wireless music rejuvenate it!

3.      Spice up your computer's audio

With the help of the BTR3K's USB DAC functionality, you can listen to music on your computer with massively improved quality. Simply connect your headphones to the BTR3K while it is connected to your computer, and enjoy your music on there whenever.


Volume Adjustment: can be adjusted independently from phone volume

Bluetooth Profiles: A2DP (enhanced), AVRCP, HFP, HSP

Bluetooth codec support: SBC/AAC/aptX/aptX LL/aptX HD/LDAC

Bluetooth Chip: CSR8675

DAC/ Amplifier: AK4377A*2

USB DAC Supported: Supported

Power/Pairing Button: Yes

Dedicated Pairing and Play Buttons: Yes

Dedicated Volume Buttons: Yes

Reception Range: Approx. 30 m (unobstructed), LDAC (quality priority 4 m)

Format Indicator: SBC is Blue, AAC is Cyan, aptX HD is Yellow, aptX/aptXLL is Purple, LDAC is White

Hands-free Calling with Microphone: Supported

Voice Assistant Activation: Supported

In-line Controls: Supported

Audio Outputs: 2.5mm.3.5mm headphone jacks

USB Connector: Type-C

Battery: 330mAh

Battery Life: Approx.11 hours

Charging Time: 1.5 hours

Check battery on smart phone: Supported (Android device support for functionality will vary)

Auto Standby if no audio signal: Supported

Dimensions: 58X 25 x 11mm

Weight: 23.5g



USB Type-C cable

Rear clip


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Due to the impact of the COVID-19 pandemic, global international shipping will delays. The delay at our Hong Kong post office is very serious, so we have changed to other fastest or most efficient international shipping. Now the normal estimated delivery time may be delayed by about 1-2 weeks. In some countries where is higher free-tax rate, we will provide free courier service as much as possible.

Free Shipping

All listed items will be shipped though Registered Airmail with tracking number if there is no extra shipping method option listed or shipping description in the product page.

Economy shipping: Will be shipped without tracking number.

Registered Airmail : Will be shipped via such as Hong Kong post , Deutsche Post , Netherlands Post , Singapore Post, you can leave us a message if you have any requirement about the shipping method .

It will be shipped via Hong Kong Post by default, Europe countries can choose to be shipped via Deutsche Post or Netherlands Post, it is also FREE, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx

  • Views: 10029
  • Product Code: BTR3K
  • Availability: In Stock
  • $69.99

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