I bought these things for like $60
Build Quality
The Udio A3s are of acceptable build quality. They're made of matte plastic. The hinge (which is also made of plastic) feels alright, with a low amount of flex. The bottom of the hinge is fairly thin, and can be easily bent, which leaves me somewhat concerned that this portion could crack if the case is dropped at a certain angle.
Sound Quality
Audio Codec and Bitrate
The Sudio A3s are only capable of using SBC. Although I couldn't notice any artifacting, you may notice that the highest frequencies are lost due to the compression, but only if you're young, and haven't rekt your hearing.
The AudioFX EQ I created to improve the A3's sound quality.
Sound Profile
The Sudio A3s have a comically exaggurated bass response. They have so much bass that you can hear the rest of the audio spectrum ducking when listening at high volumes. The trebles are also exaggurated, which feels piercing to the ears at high volumes. (Especially for me since I'm young and thus more sensitive to high frequencies) The mids at least sound fine enough. It's overall pretty bad unless you care about bass and nothing else. I think that Sudio gave intentionally made the sound profile this crazy in an attempt to make them sound impressive to the average consumer.
Luckily, you CAN fix this by creating an EQ. In my case I used LineageOS' AudioFX to counteract the mountains of bass and treble.
Conclusion
They're not particularly strong in any aspects, and sound ridiculously bassy out of the box, but they can be wrangled into sounding pretty decent, especially for just 60 kangies. So overall, the Udio A3s get a 6/10.
fine enough
3D Model
I made a crappy 3D model of the Sudio A3s for fun. This model isn't very optimized, so I recommend decimating it if you want to use it in any projects. Do whatever you want with it.