Radsone EarStudio test and review

Radsone EarStudio

This little thing makes your regular headphones wireless

EarStudio combines the best of wireless and wired audio.

Should you choose wireless or wired headset? And if you keep the thread; Do you have mini-jack connector to plug it in? Radsone EarStudio tries to be the thing for you who will not have to choose.

Another BT receiver?

The first time I saw the little gray brick I was not convinced. After a skeptical question of what in the world it was for something I became no more convinced. A Bluetooth DAC was the answer.

A small clip on the back of the EarStudio lets you attach it to the suit.

“Bluetooth receivers with mini-jacks are so dizzy, I thought.

“You can borrow it a week and try it if you want, was my previous boss’s response to the thoughts I had in my mind.

– Okay!

EarStudio dusted down my pockets for a couple of days before I actually connected it to anything. So exciting could not it be?

The receiver was connected to Denon’s excellent MM400 headphone and a pair of molded Variphone Go 2 Rock ear plugs . The latter with dual drivers and tend to be greedy against bad sources.

I was no more convinced. It simply sounded quite dead.

– Yep, this is another kind of Bluetooth receiver. I’ve heard this before, I thought, a bit above average happy to have called it when I saw it.

But still if …

The scary wow factor

On the bottom side there are bobbin buttons and play / pause button. A separate balanced micro-jack also belongs to, but we have not tested it.

A little more time was the victim of the product, which after all did not have an avid PR person to give me some hints about the functionality at the forefront. Perhaps there is an app for this thing here? If there is to be a DAC one must be able to control the functionality.

As soon as the app was set up and connected, the first impression faded quickly. I had taken absolutely wrong.

It’s an extremely capable app that separates Radsone EarStudio from just about what can crawl and get rid of similar products. And the price. Dingsen costs only about $ 50 to buy, and although it means you can end up with a final price of $ 700 with shipping and value added tax, it’s still not scary expensive for the happy audio enthusiast. At least not if you have good wired headsets from before.

Very flexible

Dingsen is charged with Micro USB, and while connected to PC, it acts as DAC and amplifies for your PC audio instead. We would love to see USB-C on this little bag, but it would have pulled up the price.

Back to the app. It controls a very flexible soundtrack inside EarStudio. Here you get a stepless equalizer with a whole lot of pre-programs, as well as the ability to add your own favorite settings.

You can choose different types of sound finishing. It’s important, even though Dingsen supports AptX HD, which comes quite close to, but not entirely to lossless sound. Thus, EarStudio makes an attempt to upgrade the audio to original quality again. Loose-free, after all, is lossless, so technically it will never handle its job 100 percent, but the most important thing here is whether it’s going to trick you.

And after some fussing with the settings for scaling and filtering, before a final round in the equalizer it just gets it. This sounds like it came through a cable straight from the source.

And if you wish, it can actually be used with cable straight from the source. Then you get 24-bit audio while the little dings are charging and getting ready for you to turn on the fan again.

The disappointment of not being able to detail the functionality of the little brick went fast when I discovered that it still stuck with Bluetooth to my mobile. And as thought, then tried; The app still worked fine to adjust equalizer, volume, and a host of other things. Thoughtful!

We are talking about something as rare as a small and cheap grandmother here.

Sound quality?

To relatively few dog slips, at least before shipping and Norwegian fees, it is difficult to claim so much of EarStudio. It’s not a cost-effective thing to thousands of dollars and it’s not built in exotic materials.

But here too, expectations exceed. It delivers a broad stereo perspective, and one of its biggest strengths is the recording of instruments in the sound image. Here it is as good as several times more expensive solutions.

Since the equalization is so good and does not seem to impair the sound quality to a significant degree, it is hard to say that this is light or dark in the tone. That’s what you need it to be, and it’s an indispensable advantage when the little dingsen is able to drive all kinds of equipment.

I’ve probably heard a more detailed tweeter from DACs than from this, but evenly the sound is significantly better than what you get from the smooth headphone jack on your mobile or PC, and not far from what you get from more expensive and bigger DAC and amplifier combinations.

It is actually balanced connection on the small block too, but it must be said to be mostly for particularly interested. It is significantly more interesting that it has a mode that adds extra feet to heavy-duty headphones.

It actually makes it possible to operate the Sennheiser HD800, but I can not report any fierce bottoms on these headsets. The combination is good enough to work, but ideally, the HD800 should have a stronger amplifier.


Radsone EarStudio is simply a surprisingly fun and useful little thing. If there is something special to draw here, design and building quality could be a bit hungry. But it costs 380 kroner before shipping and taxes, and it does not buy much aluminum.

For what it costs, it surrenders to all points and the way it works is remarkably smart. Extras like PC-DAC when it’s charging, and the mobile app controls it even when it’s in PC mode, it is adorned with the cake. Radsone may not be a company you’ve heard of before but smart solutions are obviously good.

I bend in the dust for this little lovely thing here. It is definitely not one of the usual dozen recipients.


  • Very good sound
  • Decent battery life (14 hours)
  • Extremely easy to customize audio profile
  • Relatively strong audio output
  • Works as PC-DAC during charging
  • Drives most types of headphones well
  • Works well as handsfree
  • Relatively cheap
  • Very good app belongs


  • Micro USB connection (Not USB-C)
  • Slightly uncertain building quality

EarStudio: World’s first studio-quality Bluetooth receiver – Promo Video


EarStudio – Audio Precision Test

Audio Precision is one of the most credible devices for audio performance measurement. In this test, we have used Audio Precision 2722 equipment full balance input, then connected EarStudio through USB with PC and played a 1KHz tone. This is to measure THD+N and output voltage. Our primary goal is to provide the best sound quality, and we have gone through continuous improvements.

Leave a Reply

Your email address will not be published. Required fields are marked *