--- product_id: 194520609 title: "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)" brand: "fiio" price: "€ 137.47" currency: EUR in_stock: true reviews_count: 13 category: "Fii O" url: https://www.desertcart.gr/products/194520609-btr3k-receiver-amplifier-bluetooth-headphone-amp-high-resolution-support-aptx store_origin: GR region: Greece --- # Bluetooth 5.0 with aptX HD/LDAC support Dual AK4377A DACs for pristine sound 11-hour continuous wireless playback 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) **Brand:** fiio **Price:** € 137.47 **Availability:** ✅ In Stock ## Summary > 🎧 Elevate your wired headphones to wireless audiophile status—because your ears deserve the best. ## Quick Answers - **What is this?** 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) by fiio - **How much does it cost?** € 137.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/194520609-btr3k-receiver-amplifier-bluetooth-headphone-amp-high-resolution-support-aptx) ## Best For - fiio enthusiasts ## Why This Product - Trusted fiio brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **All-Day Wireless Freedom:** Enjoy up to 11 hours of uninterrupted high-res audio on a single charge—no wires, no limits. - • **Customizable Audio Experience:** Fine-tune your sound with 8 DAC lowpass filters, 10-band EQ, and remote control via the FiiO Music app. - • **Studio-Quality Sound Anywhere:** Experience near-audiophile clarity with dual AK4377A DACs and balanced 2.5mm & 3.5mm outputs. - • **Seamless Multi-Device Connectivity:** Connect simultaneously to your phone and laptop for effortless switching between calls and music. - • **Compact Powerhouse with Smart Controls:** Lightweight yet robust, featuring USB-C DAC functionality, in-line mic & controls, plus Siri voice activation. ## Overview The FiiO BTR3K is a compact Bluetooth 5.0 receiver amplifier delivering studio-quality sound with dual AK4377A DACs, supporting high-resolution codecs like aptX HD, aptX LL, and LDAC. It offers balanced 2.5mm and single-ended 3.5mm outputs, 11 hours of battery life, and customizable sound settings via the FiiO Music app. Designed for professionals and audiophiles alike, it enables seamless multi-device connectivity, in-line controls, and USB-C DAC functionality, transforming wired headphones into a wireless high-fidelity experience. ## Description Product description Selling points summary 1. Balanced and SE output: Truly balanced design with better measurements and better actual sound. 2. Strong decoding: Flagship Qualcomm CSR8675. 3. Lossless support: Bluetooth 5.0，supports LDAC/aptX HD and other lossless formats. 4. Improved measurements: 2x high-performance AK4377A DACs 5. Precise signal reproduction: dual 22.5792M/24.576M crystal design. 6. Double-sided 2.5D glass:aluminum alloy body + double-sided glass. 7.Helps with computer audio: Driverless, plug-and-play USB DAC. 8.RGB light indicator: quickly identifies Bluetooth format. 9.Precise volume control: Volume control independent from device 10. Extended functionality from app: channel balance, audio filters, EQ Parameters BT Version:BT5.0 3.5mm Headphone Output:25mW@32Ω 2.5mm Balanced Output:78mW@32Ω USB DAC: AK4377A*2 USB DAC Sample Rate:48K/16bit Noise floor(Balanced out): 2uV Phase shift(Balanced out):0.03deg(10KHz) SNR(A-weight): 122 Now with balanced and SE output Buidling off the 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 DACs With two high-performance AK4377A DACs, the power output has increased by 50% compared to the AK4376 used in the BTR3K as well as greatly improved measurements and actual sound. Distortion -107dB | S/N Ratio 122dB | Output power balanced 78mW | Output power SE 25mW 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. Support for the AAC/SBC/aptX/aptX LL/aptX HD/LDAC audio formats ensures that you’ll get the best sound quality possible from the BTR3K. 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 rates – due to greatly reduced jitter and greatly increased audio stability. 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 1、Channel balance 2、Switch between 4 kinds of audio filters 3、10-band professional EQ (equalizer)* EQ invalid in LDAC codec Technical support for BTR3K 1.How to connect the BTR3K to new devices? Pairing mode With blue and red lights flashing alternately, it means it is in pairing mode. Note that the first time you turn on th power or clear the pairing information, the BTR3K will automatically enter the pairing mode. How to connect to new devices 1.Ensure the BTR3K is in pairing mode: long press the play/pause button for 5s to enter pairing mode with blue and red indicator lights flashing alternatively. 2.Enter Bluetooth Settings on your phone, choosing the BTR3K to complete the connection. 2.Why does the volume of the mobile phone not change when the BTR3K adjusts the volume? 1.There is a memory function within the BTR3K so that it can automatically adjust the volume. 2. We have deliberately designed the volume adjustment of the BTR3K out of sync with the mobile phone which makes it possible to adjust the volume in a more precise level and avoid many problems. What the mobile phone can adjust is the the volume of the Bluetooth codec. If its volume is too small, the dynamic effect would be affected. While the BTR3K controls the volume of decoding and amplification which can decrease the loss of the sound quality. Therefore, it is recommended to adjust the volume of the phone to the maximum, and control the volume by the BTR3K. 3.Does the BTR3K support in-line remote and the microphone function？ In-line remote The BTR3K supports the CTIA standard for line control as well as line microphone. But the headsets with OMTP protocol only support normal listening. Microphone recording Android-based cellphones can normally use WeChat,Wechat calls, QQ voice and QQ calls. The phone microphone is used when taking videos, using QQ voices and Wechat voice. It depends on different systems of mobile phones. iOS system only supports WeChat voice, calls and QQ calls with the microphone of BTR3K. If taking a video, the phone mircophone is used. 4.EQ is invalid under BTR3K's LDAC. Is it a hardware defect or a software problem? Notices: Third-party music apps could also use the EQ adjustment if it is the function of BTR3K. If it indicates that the EQ is invalid, you can turn on the EQ switch and reboot the BTR3K to activate the EQ function. EQ invalid in LDAC codec It is not a hardware defect. Since the audio processing of LDAC is more special than other Bluetooth formats, we are still doing related debugging, and striving to achieve the same effect as other Bluetooth formats, but it will take a certain amount of time. ## 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) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B085XT3V3X | | Audio Output Mode | Stereo | | Audio Output Type | Headphones, Speakers | | Best Sellers Rank | #27,200 in Electronics ( See Top 100 in Electronics ) #46 in Headphone Amps | | Brand | FiiO | | Built-In Media | USB Type C Cable | | Color | Black | | Compatible Devices | Smartphone, Speaker | | Connectivity Technology | Wireless | | Connector Type | USB Type-C | | Control Method | App | | Controller Type | iOS | | Customer Reviews | 4.5 out of 5 stars 1,458 Reviews | | Format | WMA | | Item Dimensions D x W x H | 2.28"D x 0.98"W x 0.43"H | | Item Type Name | amplifier | | Item Weight | 24 Grams | | Manufacturer | FiiO | | Mfr Part Number | FIIO-BTR3K | | Model Number | BTR3K | | Number of Channels | 8 | | Other Special Features of the Product | Microphone Included | | Output Power | 0.08 Watts | | Special Feature | Microphone Included | | Unit Count | 1 Count | | Warranty Description | 2 years | | Wattage | 50 watts | | Wireless Technology | Bluetooth | ## Product Details - **Audio Output Mode:** Stereo - **Brand:** FiiO - **Color:** Black - **Compatible Devices:** Smartphone, Speaker - **Connectivity Technology:** Wireless - **Connector Type:** USB Type-C - **Controller Type:** iOS - **Item Weight:** 24 Grams - **Product Dimensions:** 2.28"D x 0.98"W x 0.43"H - **Special Feature:** Microphone Included ## Images ![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) - Image 1](https://m.media-amazon.com/images/I/71VsOYhuksL.jpg) ![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) - Image 2](https://m.media-amazon.com/images/I/71unyxlwGRL.jpg) ![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) - Image 3](https://m.media-amazon.com/images/I/715slngMdFL.jpg) ![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) - Image 4](https://m.media-amazon.com/images/I/71TjCIcKKVL.jpg) ![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) - Image 5](https://m.media-amazon.com/images/I/81S3k6KKbtL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***E on January 3, 2021* ### ⭐⭐⭐⭐⭐ Review *by A***B on July 7, 2023* ### ⭐⭐⭐⭐ Review *by F***N on July 11, 2025* ## Frequently Bought Together - 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) - FIIO FH3 HiFi Earphones 3 Drivers (1 Dynamic + 2 Knowles BA), in-Ear Earphones High Resolution, Bass Sound, High Fidelity for Smartphone/PC/Tablet - Linsoul Tripowin Zonie IEM Cable, 16 Core Silver Plated Earphone Upgraded Cords, 1.25m SPC in Ear Monitor Cable for 7hz Zero:2 Orchestra Lite Cadenza Hype4 Supermix4(2pin 0.78mm, 3.5mm)(Violet) --- ## Why Shop on Desertcart? 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