FiiO UTWS3 Review

Fiio UTWS3

In this article, we review the $79 USD Bluetooth DAC & AMP adapter, Fiio UTWS3.


Disclaimer: Fiio sent us the UTWS3 for this review free of charge, I only covered the import taxes and fees. All thoughts and experiences with the product are naturally my own. 


FiiO is one of the most popular audiophile-focused companies in the world. You heard of them, you for sure know them. They design and manufacture a wide range of audio devices, and they are all popular.

They have been in the industry since 2007 and they are pushing the limits of audio each passing day. They recently entered into the Bluetooth playground with solid products such as BTR5 & BTA30. We recently reviewed BTA30 here. Today’s device is a Bluetooth adapter that you can connect to your MMCX or 2-Pin connector earphones and it is a feature-packed device. 

We have reviewed and awarded a lot of Fiio gear here on Headfonia over the years, check out their reviews here: Headfonia Fiio reviews

Let’s get to the review and start with technical information about the device.

Fiio UTWS3 True Wireless Bluetooth DAC & Amplifier

Available in both MMCX & 2-Pin.

Specifications & Technical Data (more here.)

Bluetooth chip: QCC3020

Bluetooth version: 5.0

Independent Amplifier Chip: TPA 6140A2

Output Power: 38mW (16Ωload) – 25mW (32Ωload) 



SNR: 100dB

Output Impedance: approx. 0.7Ω

Bluetooth Codec Support: SBC/AAC/aptX

Bluetooth Range: 10m

Unit Battery Life: TWS+ 7hs, without TWS+ 5.5h)

Battery Life: 30h (up to 5 times recharge from the 800mAh case)

Standby time: 650h 

Charging time: approx. 1.5h per ear unit, approx. 2.5h for charging case 

Output power: 25mW (32Ω), 38mW (16Ω) 

Charging connector: Type-C 

Dimensions: 93.5×71.1×34.6mm

Weight per ear unit: 6.5g (without earphones) 

Weight total: 125.5g

Fiio UTWS3

UTWS3 – What’s New?

“So what’s new with the Fiio UTWS3?”, you may ask. I’ll just quickly give you a recap of what has changed, compared to the UTWS1. First of all, we now have a new amplifier chip from Texas Instruments. TPA 6140A2 successfully boosted the output power over two folds and improved the sound overall. SNR went from 88 dB to 100dB and the noise floor improved significantly with the new circuit. Fiio introduced a better, more reliable dual-mic layout for the UTWS3.

Also, the most distinct change is that the new UTWS now comes with an 800mAh charging case. The case can be used to charge the adapters up to 5 times. It also offers a more convenient way of charging your adapters. There is more. The UTWS3 features a complete design overhaul. The UTWS3 features new light-to-touch control buttons, new high purity copper wiring, FiiO app support, better water resistance capability, independent volume control, USB-C charging, and more. We’ll talk about these, in detail, in this review. Keep on reading!

Fiio UTWS3

Packaging & Accessories

The UTWS3 comes in a black, elegant FiiO box that we got used to from previous FiiOs. FiiO did not list the specifications or technical information on the box so it looks quite black. As for accessories, you only get a short USB-A to USB-C cable. I would prefer a longer one for increased convenience. Despite being short, the supplied cable is of good quality.

Fiio UTWS3

Build & Design

Fiio’s track record has always been good. I still remember the first time I held Fiio X5 DAP in my hands. Even their budget-oriented products maintain a distinct design line for years without falling below a certain quality level. That is, in my opinion, one of the strong suits of FiiO. Their price to performance ratio has always been good too. Fiio’s first universal adapter that was designed to liberate you from the cables was the UTWS1. They have now improved it and here we are with the UTWS3. 

The UTWS3’s design is mostly plastic, however, it looks and feels like metal thanks to the matte black finish. Frankly, I liked the build quality of the UTWS3. The hinges and the lid seem durable. If you go ahead and open it, you will notice that FiiO has put a smooth fabric to protect your IEM’s faceplates. Immediately after that, you will notice that it has enough space to store big CIEMs or IEMs that you might have.

FiiO has placed a multipurpose button in the middle. If you long-press the button for about 3 seconds, it will go into the pairing mode. If you hold it for about 12 seconds, you will start the resetting process. Lastly, if you only tap it once, you will be informed about the remaining battery. Moving on to the units themselves, they are quite light to start with. I like the new, smoother finish on the hooks. It enhances comfort while sitting on your ears. There is a small grille under the unit and according to FiiO, that is the primary mic that picks up your voice. There is another grille near the top of the unit and that’s for picking up the ambient noise. These have the cVc noise-canceling feature that we are going to talk about in the upcoming ”Features” chapter.

Apart from that, the smooth surface that majorly touches your ears has a memory wire inside. You can adjust it to fit your ears perfectly. I especially like the Left & Right indicator rings that have a color-coded metal finish. In this part, FiiO used monocrystalline silver-plated copper to enhance conductivity and improve dynamics. Units themselves are mostly made of plastic as well. It is the same plastic that was used in the case. It feels good in the hand and on the ear. There is a multi-functional button on each of the units. We will talk more about it very soon. As for the form & factor, I think FiiO did a good job here.

The case is not monstrously big like we’ve seen with the Fostex TM2. The units are very compact as well compared to IEMs that you’re probably going to pair them with. Assuming you want to liberate your multi-driver IEMs, of course. Slight note here. These will probably won’t work with flushed 2-Pin IEMs so be aware of that fact. 

The review continues on the next page. Click HERE or use the jumps below.

4.4/5 - (220 votes)

Long time Tech Enthusiast, an ambitious petrol-head, Yagiz likes his gadgets and always finds new ways into the tinkerer's world. He tries to improve anything and everything he gets his hands onto. Loves an occasional shine on the rocks.


  • Reply March 7, 2021


    I wonder how well these would pair with the HA-FDX1. Though considering they don’t really color the sound sig of the IEMs you paired them with, it sounds like it should be fine.

    • Reply March 8, 2021


      Sadly I haven’t heard the FDX1. Though I occasionally miss my JVC HA-FX1200. Good old days.

  • Reply March 8, 2021


    Good to hear you have not experienced and drop outs. Mine had drop outs regularly when my phone is on the opposite pocket to my earpiece paired via Android phone bluetooth (Samsung s9). Also unable to upgrade device via firmware in Fiio control app regardless of wait time. Used for a few months with no improvement so maybe it’s just the batch.

    • Reply March 8, 2021


      Yes it may be a batch issue. I am using Android 11 (F2 Pro) that may also be a factor. There are a lot of wireless devices featuring the QC3020, it is a very common chip.

  • Reply March 8, 2021


    I’m waiting for a TWS dingle that can do both Transparency mode And Independent L/R playback

    • Reply March 8, 2021


      Edifier noise cancelling can do both.

  • Reply March 9, 2021


    any chance you will be reviewing the Shure True Wireless Secure Fit Adapter?

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