I love music and I like to listen to music while jogging. If I do not have music, I don’t want to exercise at all. Music gives me energy and pleasure as I exercise. Therefore I need a pair of Bluetooth earbuds that has excellent sound quality to help me exercise with pleasure.

I bought the A90 Pro True Wireless Earbuds to replace the ones that cost less because of unsteady connection at specific locations while jogging with an MP4 player in a pocket of my shorts. I found that connection of the A90 Pro earbuds was much more steady than the ones that cost $6 less. There was only a split second of unsteady connection with the A90 Pro earbuds when passing the entrance of a company with lots security equipment instead of a few seconds of unsteady connection experienced with the ones that cost less.

I later found out that I was supposed to keep my MP4 player at chest level with an armband case or hold the MP4 player at chest level with my hand while jogging instead of putting it in a pocket of my shorts where it was subjected to vigorous shaking. When the MP4 player was kept at chest level, there was no problem of unsteady connection anymore.

It should also be noted that the strength of connection between a music player with Bluetooth does not solely depend on the quality of the Bluetooth receivers of the earbuds but depends on the quality of the Bluetooth transmitter of the music player as well. So it is important to have a music player with a good Bluetooth transmitter to work with these earbuds with good Bluetooth receivers.

The A90 Pro earbuds are very secure in my ears no matter how fast I jog or run. I never worry about them falling off. They are so comfortable to wear that I barely feel anything in my ears but the beautiful music.

Listening to music at home within a large room is no problem at all. I can leave my MP4 player on my desk and I can listen to music anywhere in my room with very steady connection. If I go outside my room and the connection is broken up, the earbuds will automatically reconnect with my MP4 player when I walk back in my room within 5 minutes. So far I have only used the earbuds non-stop for 3 hours with no problem. I have not tested exactly how long the the earbuds can be used non-stop. I expect them to play much longer than 3 hours.

I am very satisfied with the sound quality of the A90 Pro earbuds. But in the first few days I was not quite satisfied in spite of the high definition sound that allowed me to hear every instrument and the vocal distinctively because I could hear only normal bass but not the heavy bass that I loved. I was so happy when I found out that when I switched the earbud tips from small to large, my ears were bombarded joyfully with heavy bass that I loved.

It turned out if you use earbud tips that are too small, the bass can not be enhanced. However, if you use earbud tips that are big enough to seal off your ear canals, you get heavy bass. Therefore, if you love heavy bass, put on the largest earbud tips that you are comfortable with to find out if you can hear the same dramatic and wonderful transformation to heavy bass that I am enjoying now. You can search YouTube for some extreme bass music videos to test how good the bass from the earbuds has become. With the music and heavy bass that I love playing from the A90 Pro earbuds, my jogging is now more like dancing than jogging and I love it.

Even though I can tell that the sound quality of the A90 Pro earbuds is very good when I listen to music with strong beat for exercise outdoors in spite of traffic noise around, it was not until I used the earbuds to listen to some exquisite instrumental music at home in the quiet of the night that I realized how magnificent the sound quality of the A90 Pro earbuds is. In fact when the A90 Pro earbuds are used in combination with the large earbud tips to enhance the bass, they sound just as good as ( Correction: I found out later that as far as super bass is concerned, not just as good as but MUCH better than) the very expensive professional headphones that I have in spite of their much smaller size. The A90 Pro earbuds are indeed earbuds of professional quality.

Moreover, the A90 Pro earbuds also have the advantage of allowing me to blast the music at full volume at night without worrying about anyone complain about being disturbed by the music if I use the headphones instead. Remember the ugly headphone hair that comes with using the headphones? That problem is also solved by using the A90 Pro earbuds.

I suggest every new owner of the A90 Pro earbuds spend some time practicing how to control various functions of the A90 Pro earbuds so that one can enjoy using the earbuds with ease of control and would not mistake wrong control on the earbuds as malfunction.

I would recommend the A90 Pro True Wireless Earbuds to anybody who wants to have a pair of high quality Bluetooth earbuds at a reasonable price.

Additional Review about Heavy Bass: My review is probably too long already. However, since I found some music videos on YouTube with heavy or super bass that have demonstrated beyond doubt the superiority of the A90 Pro earbuds over the expensive professional headphones that I have during comparison, I just can’t help but inform people shopping for earbuds or headphones about it. (Don’t forget to use the largest earbud tips your ears can handle.)
Here are the titles of two music videos that I want to share (No links allowed on Amazon reviews) :
Dj Kantik – Teriyaki Boyz – Tokyo Drift & Sean Paul – Temperature (Remix)
For this song, both the A90 Pro earbuds and my expensive headphones sounded equally well at high volume. However, I could only use the headphones to play at high volume at night very briefly for comparison because the leaking sound was too loud.

In The Air Tonight – Phil Collins (Extreme Bass Boost)
Seriously, when I first heard the extreme bass of this track with the A90 Pro earbuds, I really thought there was an earthquake. I also had the illusion that my monitor was vibrating while my brain was being bombarded by the super bass. I was flabbergasted that the tiny A90 Pro earbuds could create such mind-boggling super bass at high volume without being impaired at all.
On the other hand, I was surprised that my expensive headphones could not handle the super bass of the same track and the super bass sounded like the speakers got damaged.

Of course, the A90 Pro earbuds should not be compared to the performance of a $10,000 high-end home audio system. But for such a wonderful price, the performance of the A90 Pro earbuds have far exceeded my highest expectation of what earbuds should sound like.

Additional Review about Using Two Devices: I have been using the same A90 Pro earbuds with two different devices, my MP4 player and my computer with a Bluetooth Transceiver which I bought later. When I want to use the earbuds with the computer, I have to go to the Bluetooth page of my MP4 player and turn off the Bluetooth connection on that device first before I can connect the earbuds automatically with the transceiver. After that if I want to use the earbuds with the MP4 player again, turning the power of the transceiver to OFF is only the first step. I have to turn the Bluetooth function of the MP4 player to the ON position again to make the earbuds work.
We should understand that there is no such thing as “automatic connection of the A90 Pro earbuds with two devices” because whether you can use the earbuds with a device can depend on if the Bluetooth function of the device has been turned ON or OFF. Just because I turned off the transceiver doesn’t mean the Bluetooth function in my MP4 player will turn back on automatically. Therefore, I have to turn the Bluetooth function in the MP4 player back to the ON position again before I can use the MP4 player after using the earbuds with my transceiver . There were times when I forgot to turn the Bluetooth of the MP4 player back on and thought mistakenly that the earbuds were to blame when there was nothing wrong with the earbuds at all.
I also saw a one star review complaining that the description lies about the earbuds would automatically switch between devices so we would not have to manually disconnect them in order to pair them with another device. Obviously, that complaint was due to the customer’s misunderstanding of the description on page 4 about “How do I pair two headphones with my phone?”. ( ” two headphones” should be described as “the two earbuds” instead.) Nowhere does the the User Guide claim the earbuds would automatically switch between devices so you would not have to manually disconnect them in order to pair them with another device. In fact that is not possible with any brand of Bluetooth earbuds because a portable device that a user doesn’t want to use anymore cannot read the mind of the user and turn off the Bluetooth function automatically. If the Bluetooth function of a device has been turned off, it cannot read the mind of the user to turn the Bluetooth back on automatically, either. However, in the situation that the earbuds are used on a second device that is so far away from the first device that the earbuds are disconnected due to the loss of signal, then the Bluetooth function of the first device needs not be turned off before pairing the earbuds with the second device.

On the other hand, headphones that use radio signal without Bluetooth can be plugged into either a computer or a TV set and used without pairing at all but they have to work with a bulky transmitter which is not suitable for portable devices.

These earbuds are great! The volume is great. No outside noise gets through. I bought myself and my daughter a pair. They fit snug in our ears; no falling out. I can throw mine in my bag and she puts hers in her backpack. They are so portable. I love the controls. Just a single or double tap controls them. They charge super fast and they last all day at my job. They are an awesome pair of earbuds for the money!!