Bluetooth with LDAC,
aptX LL, aptX HD & AAC
Upto 78mW @ 32Ω
Battery Capacity of
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Unboxed units are as good as new products with the product's packaging being unavailable. These products give you the same satisfaction of new products - but at down-to-earth prices. Usually, the product's packaging may have gotten damaged in transit. Customers use a product once or twice and then return it with opened up packaging.
Returned headphones are fully functional products that have left the warehouse and therefore can no longer be sold as new as their packaging has been opened. The product may have been used once or twice by the customer who returned it.
Sometimes we receive headphones in damaged packaging due to shipping accidents. These are brand new headphones with cosmetic flaws on the packaging.
Save Upto 15%Since you won't get the original packaging, we give you a good discount compared to a new headphone.
Professionally InspectedA thorough inspection means you receive a 100% working headphone with no sound output issues.
Original WarrantyAll unboxed headphones carry the same warranty period as a brand new headphone would.
Unbiased Customer ServiceWe have the same Headphone Zone customer support experience for Unboxed Products or new products.
Unchanged Replacement PolicyReceived a defective Unboxed unit? Return it under our Replacement Policy.
ALL Original AccessoriesThe unboxed headphones itself comes with all original accessories.
A CAPTIVATING DESIGN THAT FEELS SILKY SMOOTH TO THE TOUCH
Smartphones are designed to be convenient and therefore the FiiO BTR3K mirrors a smartphone design for your ease of use. The aluminium alloy body and a glasslike structure add a sense of style to the overall design. An oleophobic coating on the BTR3K keeps fingerprints away. To add a touch of artistic elegance, the FiiO BTR3K uses lettering and smooth texturing.
ELEVATE TO INCREDIBLE GAIN PERFORMANCE WITH BALANCED & SINGLE-ENDED OUTPUTS
Building on the best aspects of the BTR3, the all-new FiiO BTR3K goes a step ahead to add balanced output. Sporting a pure balanced design, the BTR3K features a DAC and amplifier that are tuned for the left and the right audio channels. This exquisite arrangement is the heart of the BTR3K that propels the purest sound possible.
MORE POWER AND ACCURATE SOUND DRIVEN BY AK4377A DACS & DUAL CRYSTAL OSCILLATORS
The power output of the all-new FiiO BTR3K is practically double the power output of the BTR3. This is the direct result of the high-performing AK4377A DACs used in the newer variant that improves measurements and the overall sound. These DACs are paired with the 22.5792M/24.576 MHz dual crystal oscillators. These simply extend the BTR3K's capacity to produce accurate audio signals by reducing jitter and enhancing audio stability. So regardless of the sampling rate, which you are working on, the FiiO BTR3K consistently registers accurate sound.
EXPLORE PREMIUM-LEVEL BLUETOOTH 5.0 FUNCTIONS WITH THE QUALCOMM CSR8675 CHIP
Multi-device pairing and robust wireless connectivity are among the finest features
of Bluetooth 5.0 which is utilized in the FiiO BTR3K. The Qualcomm CSR8675 Bluetooth chip installed in the
FiiO BTR3K operates on less power. It is designed particularly for enhanced audio applications. Experience
the world of high-quality digital music with the BTR3K as it supports 120 MHz DSP, 24-bit transmission and
processing along with the ability to decode a range of lossless Bluetooth codecs including AAC, SBC, aptX,
aptX LL, aptX HD & LDAC. Watch movies, play games and listen to music with quality sound always at your
IT'S ALL ABOUT CONVENIENCE & FLEXIBILITY WITH THE RGB LIGHT INDICATOR & AN 11-HOUR PLAYTIME
The moment you plug a headphone into your BTR3K, it automatically adjusts the output and if the headphone has CTIA controls you can use it to manage your music. Using multiple Bluetooth formats at multiple places might get confusing, but not with the FiiO BTR3K as it comes with the RGB light indicator. This light indicator displays the currently used format waste time keeping the track. It takes around 1.5 hours to fully charge the BTR3K while it gives you up to 11 hours of music playback. You can even charge the BTR3K while you are listening to music, all thanks to the USB-C Type C connector.
CRYSTAL-CLEAR VOICE CALLS WITH A NOISE CANCELLING OMNIDIRECTIONAL MICROPHONE
The amplifier at the core of the FiiO BTR3K is not just for quality sound but also for crystal clear audio calls. Packed with an omnidirectional microphone and phone controls, the BTR3K lets you handle voice calls with utmost clarity. To further aid calling convenience, the BTR3K is equipped with 8th generation Qualcomm cVc noise cancelling technology. So the next time you are on a call, make sure your voice is heard with clarity and without noise.
TAKE COMPLETE CONTROL OVER YOUR BTR3K WITH THE FIIO MUSIC APP
When you connect your FiiO BTR3K to a Bluetooth device, you get two volume controls—one on the Bluetooth device and the other on the BTR3K. This allows you to control the sound with better precision. The BTR3K is a smart device, it's compatible with voice assistants and remembers your preferred volume level so that you don't have to change it every time. You can get even better control over your music by using the FiiO Music App that has a 10-brand professional equalizer, channel balance and 4 audio filters. With a detachable ear clip included, you can carry the BTR3K around, easily.
PAIR IT WITH YOUR OLD SPEAKER, PC OR YOUR CAR AND NEVER MISS HIGH-QUALITY MUSIC
Listen to music while you are driving with the dedicated car mode. Kindly note that when the BTR3K is connected to the car via USB, it will start and stop along with the car. You can spice up your old speaker by simply connecting it to the BTR3K via a 3.5mm jack for a wireless music listening experience. Pair it with your computer or laptops to improve the sound quality.
|DIMENSIONS||About 58×25×11 mm (exclusive of back clip)|
|WEIGHT||About 23.5 g（incl. battery）|
|VOLUME CONTROL||Side buttons|
|AUDIO INPUT||Bluetooth connection (Bluetooth 5.0 supported)|
|SUPPORTED AUDIO FORMATS||AAC/SBC/aptX/aptX LL/ aptX HD/LDAC|
|MIC FUNCTION||Support Bluetooth call, built-in omnidirectional microphone; support external microphone of CTIA cable|
|HEADPHONE OUTPUT||3.5 mm stereo jack|
|USB PORT||Type C USB|
|BALANCED HEADPHONE OUTPUT||2.5 mm jack|
|CHANNEL BALANCE||≤0.1 dB|
|STATUS INDICATOR LIGHT||RGB light indicates the input Bluetooth audio codec
charging and working status
|APP INTERCONNECTION||Supports setting through App|
|BLUETOOTH CODEC DISPLAY||Supported|
|CHARGING TIME||≤1.5 h (DC 5V 500mA)|
|POWER INPUT||Recommend DC 5V 500mA|
|BATTERY CAPACITY||330 mAh|
|OUTPUT POWER||PO about 25mW（32Ω loaded）
PO about 50 mW（16Ω loaded）
BAL about 78mW（32Ω loaded）
BAL about 40 mW（16Ω loaded
|FREQUENCY RESPONSE||20 Hz～20 kHz (aptX connection）
20 Hz～40 kHz (LDAC connection）
|THD+N||PO＜0.003%(LDAC 1 kHz A-weighted)
BAL＜0.002%(LDAC 1 kHz A-weighted)
|OUTPUT IMPEDANCE||PO≤0.3Ω（32Ω loaded）
|NOISE FLOOR||High power model& A-weighted - PO≤1.0uV BAL≤2.0uV
Low Power model & A-weighted - PO≤4.5uV BAL≤4.5uV
PO: 0.9V (no loaded)
BAL: 1.59V（32Ω /THD+N＜1%）
BAL: 1.8V(no loaded)
|SNR||PO≥119 dB (32Ω A-weighted)
BAL≥122 dB(32Ω A-weighted)
|CROSSTALK||PO≥ 73dB（1 kHz 32Ω loaded）
PO≥ 114 dB（1 kHz no loaded）
BAL≥ 108dB（1 kHz 32Ω loaded
BAL≥119 dB（1 kHz no loaded）
|SAMPLING RATE SUPPORTED UPTO||48kHz/16 bit（USB DAC）|
|ACCESSORIES||Type C USB charging cable*1, Quick Start Guide*1, Warranty Card*1,Back Clip*1|
|CHIPS USED||DAC: AK4377 A* 2
|BATTERY LIFE||Low Power model：BAL &P about 11h
High power mode：PO about 9.5H，BAL about 7.5H
|BLUETOOTH TRANSMITTER||iPhone （AAC）|
|CONNECTED HEADPHONE||M3 open earbuds（27Ω）|
|VOLUME||With set output at 40mV|
|WHAT YOU WILL GET||1. FiiO BTR3K|
|2. USB Type C cable|
|4. Rear clip|
|5. Warranty Card|
|WHAT YOU WILL NOT GET||1. Original Packaging of FiiO BTR3K|
When connecting to the computer in USB DAC mode, you can find that the audio output device appears FiiO BTR3K. With the white light on, the sound can be output. It is recommended to use FiiO LT-TC1, a double-end TYPE-C cable, which can be perfectly matched with the charging box data function of your Macbook Pro. What's more, it can also be charged by connecting the PD charger.
The BTR3K supports the CTIA standard for line control as well as line microphone. But the headsets with OMTP protocol only support normal listening.
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 microphone is used.
No playback and operation means the BTR3K is in stand-by mode after connecting. When there is no connection, it would automatically turn off after about 2min(you can choose the working time in the APP's settings). Its battery life is about 300 hours in idle status.
With a built-in li-polymer battery, its battery capacity is 330mAh. Under low gains mode in AAC codec, it can continue to work for 11hours with merely 1.5-hour charging time. LDAC priority would allow a battery life for about 8 hours ; LDAC standard for about 9 hours; LDAC connection priority for about 11 hours; aptX for about 9 hours.
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.
【How to use this function】
1. When the BTR3K is connected to Device1, long press the play button to enter pairing mode again. Search for BTR3K in Device2 and then make the connection.
2. Go to the Bluetooth settings in Device 1, clicking the BTR3K for reconnection. Or turn off the BTR3K and turn it on again. At this time it can reconnect to two devices at the same time.
【When connecting to two devices and playing music at the same time, there would be sound collapse?】
Please avoid playing in both devices at the same time. If the two devices are playing music at the same time, the space and resources on the BTR3K would be occupied, because at this time the BTR3K is receiving two signals simultaneously but with the priority to the current playing device. Therefore it would cause the problem of sound cutting. Additionally, it is normal that the music having the collapse issue when switching the playback in the two devices.
iPhone devices are limited within AAC and SBC formats so that the Bluetooth codecs could not be switched. Normally it is defaulted as AAC, and SBC in phone calls.
Go to Settings-Bluetooth to delete the BTR3K pairing information and reconnect it to BTR3K.
【Clear the pairing information on BTR3K】
When it is on, hold both the volume- and volume+ buttons at the same time until the indicator lights stops flashing. Restart it and then trry to make the connection again.
Long press the play/pause button for 10s at any time.
It is prior as USB DAC . Therefore, when the BTR3K is working in both Bluetooth audio and USB DAC outputs at the same time, it would take the USB DAC output as the priority. By connecting it to the app the output modes can be selected in the settings menu.
1 Year Warranty
Don't sweat it, this FiiO - BTR3K (Unboxed) comes with a warranty
from FiiO that covers manufacturing defects.
All products featured on Headphone Zone are backed by an original manufacturer's warranty.
Read more about FiiO's warranty in India.
Portable Bluetooth DAC/Amp
"Volume adjustment is independent from the source device,whether the BTR3K is connected via Bluetooth/USB.In both cases it keeps its own volume that's distinct from the source."Read More
"The sound of BTR3K is very clear warm & smooth,with a thicker presentation,less treble energy than BTR5, it very clearly favors neutral and brite IEM's,rather than warm & neutral ones."Read More
"The main shell is made of aluminium alloy while the front and back are 2.D reinforced glass,the device will inspire confidence to use it without fear of falling apart. "Read More
"Bass is natural with normal depth & resolution, but both parameters are slightly cut off by Bluetooth codecs.There are no attempts to force bass and it is good for textures & technicality."Read More
"The trick with FiiO BTR3K is that it is affordable, mini-sized, and most probable to be paired with a Chifi IEM, all of which are known for their fairly strong treble and bright signatures."Read More
I own both the BTR3K and BTR5 so will compare both against each other.
My use case: Since new phones don't have 3.5mm output, I wanted something to play music, watch videos and take handsfree calls on my phone. I was only going to use either an earphone (Sony MDR xb55ap) or a regular headphone (ATH M40X).
Build quality - Amazing. No sharp edges, looks modern, small size, light weight. Can be easily clipped to shirt collar with the provided plastic clip. It is so light and small that in a few minutes, you forget it's even there. BTR5 is twice bigger and heavier. It is also small but not so small & light that you forget it. It is another device that you have to carry in your pocket.
Sound quality - Waaaay better than anything found in a phone/laptop/tab. If you haven't heard any other DAC/Amp so far, this will be audio nirvana for you. Good music separation, tight bass, wide soundstage, clear vocals, no background noise/pop.
Microphone - The microphone works as it should. If your earphone has mic, it picks up that. If it doesn't, it uses it's own mic. But since it will be on your shirt collar, it also picks up surrounding noise. So either use earphones with mic or bring it closer to your mouth which looks weird especially to others or take calls in a quiet environment.
Battery - Lasts a whole day easily from morning till late night.
Bluetooth range & latency - Depends on codec being used. LDAC has shortest range (one room only) but best audio quality. AAC has longest range (3bhk house) but worst audio quality. aptX is somewhere in between so pick as per your need. I mostly use LDAC and the latency/lag/delay is barely noticeable. It is there but only if you really notice. Pause and play again if there is delay in videos.
Value for money - Would have been perfect if Fiio had priced it 1K less but even at the current price, it is the best in the market for what it does. So okay there just not great.
Comparing with BTR5 - This is where it gets interesting. BTR5 has an objectively better sound quality. It is slightly sparkly in treble, has tighter bass and perfect timings on vocals and beats. It makes songs way more enjoyable and lively. BTR3K is laid pack in perspective, it is slightly warm, less tight bass and is loose on vocals and beats. And this is where it boils down to what you need. For long listening sessions (>1 hour), I prefer BTR3K. BTR5 sounds lively and immersive but it is so prominent and "in your face" that you can't focus on anything else. So, for my use case, where I wanted something to play music/videos on phone for long hours and still work or read/cook/run etc., the laid back sound of BTR3K is much better. It doesn't get fatiguing even after hours of music and the slightly warm sound is relaxing for videos/calls. Get BTR5 if you want to close your eyes, sit in a sofa, drown in music and do nothing else. Or if you have power hungry headphones. I now mainly use it as a DAC for my speakers in which it excels. If you plan to casually listen and work/study/run etc. BTR3K is better as its less revealing and fatiguing. BTR5 is better than BTR3K in analytical sound quality but it depends on your listening use case. Fiio has very cleverly designed and placed these products. BTR5 is well worth the extra price IF you have use for it and don't mind the DOUBLE size/weight/presence.
Headphone zone experience - Flawless. Delivered on time and the product is new. I even received some audiophile songs recommendations which is a good touch and sets them apart. Delivery updates were on time and accurate. Have been ordering from them and will again in future.
Thank you for such a detailed review, definitely gonna help our customers to make an informed decision. Great to know you had a comfortable shopping experience. Thank you for the review & ratings!
This small amp/dac combo has absolutely changed how i work and listen to music. Being a bluetooth adapter is such a big plus, it does not limit me by the length of earphone or headphone, and the fact that you can use the inbuilt mic of the eaphone/headphone is a major plus, that means you dont have to clip the adapter near your neck, you can just toss it in your pocket and chill. The difference is there when you use it as a usb dac, it sounds way better than the normal audio output. Ability to connect 2 devices and switch between them effortlessly is also useful. A tip - upgrade the firmware version to 1.3 , then you can reprogram the volume up and down button, to a limited extent ofc. Very happy with this product 10/10 will recommend to anyone.!
We thank you for this lovely review & we are glad you are enjoying it! Keep the music playing & Welcome to the Club.
I was really skeptical about the power output figures, weather it would be able to drive my EX1 and Aria's however I was pleasantly surprised that not only can it drive them but there room to spare and that is out of the single ended output. You obviously cannot compare the overall sound quality to a desktop amp/dac but it does the job. Bluetooth connection is pretty stable upto 10 m beyond which it starts to distort. Hats off to Headphone Zone and Bluedart for the really fast delivery. I have bought quite a few products from them over the years and they do not disappoint with their delivery and customer service.
Thank you for sharing your review. We're so happy to hear that you've had a good experience with us.
It's just amazing to hear what this little dac can do! I use it to wirelessly connect to my JBL stage a170 tower speakers via an amp. The amount of soundstage and details which this added was just mmmmm...apart from that I love the touch of uniqueness from headphonezone, it's my first purchase from here and it was a great one.
Being a newbie in the audiophile rabbit hole , I wont get into soundstage, tonality etc. Cuz these sound absolutely phenomenal to my ears! This small nugget of a DAC/AMP is all you need.
Changed the way I listen to music forever.
- ultra small, hence extremely portable
- supports wide range of codecs
- 7 hour battery
- crystal clear audio
- balanced audio is way better (highly recommended to get balanced cables)
- 10 band eq
- low pass filters to change the way the bass sounds
- built-in mic
Using these on zs-10 pro with auto-eq settings
So happy with the purchase, I have gifted it to my sister as well!
Hey there, nothing makes us happier than knowing you loved your purchase, hope you had a comfortable shopping experience and thank you for the great review and ratings!
I purchased this for outdoor listenning with my Legacy 3 IEM. I used to have a Lypertek Tevi TWS but after their battery died suddenly I decided to go with a bluetooth DAC instead of a new TWS that sacrifices on audio quality. It's perfect for my use case and its bigger brother (btr5) has rave reviews all over the interwebs.
I have loved the sound out of the 3.5mm output and I did notice that I need to turn the volume up quite a bit. But this also supports balanced output and that is supposed to have a greater audible range.
Few quirks that I didn't like:
1. The battery level follows a step function of 20. I have never seen any battery percentage that is not a multiple of 20 yet.
2. Unlike the btr5 there is no screen and instead there is just an rgb led. Not a big deal for me but seems like there's enough space to show the volume level at least.
We appreciate your honest & elaborative review as well as awesome ratings, Debaditya Chatterjee!
Thank you Headphone Zone team for timely delivery especially in this situation and bringing this product to India I recommend everyone to check this one before considering other alternatives in the market.
Good Purchase with Good Delivery Experience!!! Delivery Experience - Extremely satisfied. The packaging was sufficient and delivered 2 days before the committed delivery experience. Delivered in almost 48 hrs.
Good and quick delivery from Headphone Zone and would recommend others to buy from them too. No issues from their end whatsoever.
Amazing support from the Headphone Zone team, this is my second product purchase. Delivery at critical times (COVID19), is just awesome, received my headphones one day before the committed time. Kudos to the team.
It’s one of the best sites to get premium quality headphones. Their service is unparalleled!! Would recommend 10/10. A Grade service!!
Experience was smooth. The Headphone Guru was kind and answered all my queries. The delivery was super fast. The product is genuine This is my go-to destination for everything audio from now on.
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