Very good for the price.
Been hearing about the Earstudio for some tim and I’ve wanted to give it a shot with my many Mobile IEMs with 3.5mm plugs ever since phones lost their headphone jacks. I’ve tried the TWS dongles with both 2-pin and mmcx earphones and honestly for a $50 product they are brilliant even with flaws. However, this little tiny thing sounds so much better than a phone’s output or the TRN dongles that it’s easily worth the extra money and the aggravation of corded earphones. If you prioritize good sound this is about as good a portable Bluetooth headphone amp as you’re going to find until you get into multiples of the price. I have an SMSL DAC/amp with a separate power supply that sounds better with these mobile IEMs but you’re stuck in place listening to that. The Earstudio just does a great job in a tiny and ultralight form factor.
Sound is better than expected with a smooth character that is rare in this price range. Good solid decoding of lossy Bluetooth audio right up to the highest quality AptX streams. Bass has authority and speed and rarely feels wireless. Midrange has plenty of smooth, listenable presence without honking or fatigue (with decent source material) and highs are well beyond the capacity of many good IEMs to reproduce. In the audible range the highs are just Goldilocks. Enough sparkle without the harshness or sibilance artifacts may experience with products in this category.
Ok I’m heaping praise on this thing. My main quibble is that it has not built in functionality for the inline remote, mic and volume controls of many headsets. I’d like to see that in the future. You have to use the controls and mic on the unit itself.
if you like good sound on the go without carrying around a mobile hi fi rig with a giant rubber band like so many hi fi addicts do, try this. It won’t give you the performance of a nice DAP and a good portable DAC/amp but you don’t need it to for this money. You can take this thing all over where you wouldn’t think of taking that fancy expensive gear. It’s got enough oomph to drive many over ear headphones sweetly, especially the lower impedance Beyerdynamics for example. It won’t rock your socks off with your HD650s but it will make chamber music or acoustic jazz sound great on them at reasonable volume levels.
The Radsone Earstudio is my ideal balance of performance and portability. Once it gets more involved than this I just leave it at home but this tiny box has brought many great earphones back out of storage.
if you don’t like wires and are happy with the sound of some of today’s TWS options the Earstudio may seem like a weird product to you. If you like better sound and have some nice wired earphones laying around not getting any love, it makes perfect sense.
If you’re planning on using the Earstudio with the 2-pin or MMCX in-ears it was designed for, spend a little money for a solid balanced cable with a 2.5mm balanced plug. Even a cheap one sounds better than the SE cable that came with your IEM. I bought a $12 MMCX balanced cable and a $13 2-pin version from AliExpress and both of these cheap cables easily outperform even pricey single ended cables with the same phones on the Earstudio. Better channel separation, transient response, air, noise floor, bass response, overall coherence and slam. every earphone I’ve used in balanced mode has been much more engaging, musical and powerful than in SE mode.
This product makes Bluetooth a viable option for me. As with all audio gear, your experience will differ from mine. You own different ears as well as different earphones. I recommend having the Earstudio on hand if you have a lot of pretty nice wired earphones laying about, especially ones with replaceable cables. It will bring those earphones back into your life. I have a beautiful sounding pair of Trinity Audio earphones I probably never would have used again. They are hard wired for single ended use only. They’re so good with my ears, I prefer listening to them over Shure 535s in balanced mode. Even though your experience will differ from mine, if you have any IEMs that were $200 or more, you will probably be delighted at the performance of this tiny, relatively inexpensive little box. I know other firms make things that do some of what the Earstudio does. But some are so expensive you don’t want to take them outdoors on the street or hiking or near water for fear of loss or damage. Radsone has packed good-enough sound and great functionality into a box you can take anywhere, and priced it for its mission.
Would recommend to a friend.