This is just a fantastic IEM for Price Vs SQ. It reminds me so much of my 1st Audiophile IEM - the Crossroads Bijou 3 but just better in many aspects. It has good lows and highs and mids. This is very unlike the highly rated T-Peos H100 which I had a big problem with it's piercing treble and almost non-existent mids and that was about 10 times the price. Compared to my GR07BE (which I loved) the imaging seems to be better and the built quality looks much better than GR07BE. GR07BE also lacked something (depth? separation? something I cannot really describe). The only other IEM I got is a CIEM I made (using the TF10 as base). Even compared to it, the Hyperion is close. I actually forgot what the TF10 sounds like but from what I can recall, they were my best IEM ever.

I tried it with my Cayin N3 DAP. Forgot to add, the Bijou 3 was Malaysian $190 and Hyperion was just $50. Trying to find it to see how remarkably similar they are. The built quality/cable/tips are all better on the Hyperion ofcourse.

Edit: Sorry, the Bijou 3 is notably bigger than the Hyperion.

Disclaimer:
Firstly I would like to than Stars Picker Enterprise for sending me the Shonyun SH-306A for this review. I'm not affiliated with either Stars Picker Enterprise or the Shonyun company.  
Specifications:

I'd like to thank Jack Fu of HiSound Audio for sending me a review sample of both the PAA-1 Pro and the E212. I burned these in for around 20 hours, 
 
 
Tested with
 
Galaxy S3 with PowerAmp & Noozxoide Eizo Rewire, HP 4410S notebook.
 
Package
 

• PAA-1Pro
• Cable clip
• 3 pairs of ear bud sleeves
• A Nice & functional IEM storage box
• Cable manager

 
Audio Quality
 
 
I compared the PAA-1Pro to the following IEM's and ear bud: HiSound E212, Crossroads Bijou3, Generic Sony Ear buds. I unfortunately had a fit issue with the PAA-1Pro as I couldn't get a proper fit and only way to get the proper sound quality was by cupping my hands to my ear and as this is not very practical but this is what I did for the review. My wife on the other had had no fit issues. I feel the burn-in made quite a difference because, out of the box, they sounded just marginally better than my generic ear buds and was not on the level as the E212 without burn-in.
 
The PAA1-Pro has an overall pleasing sound signature for me in terms of the lows, mids and highs. All were well control and did not overshadow each other. There was a lack of instrument separation but this could be due to the limited burn in (20 hours) I had with them. I'm sure this will change over time as the 20 hours burn in had a difference. The sound stage had more width in it than it had depth. Maybe a 50 hour burn in could change that.
 
The sound quality of the PAA-1Pro is a lot better that my Sony ear buds but I liked the SQ of the E212 better and compared to the Bijou3, the PAA-1Pro had better wider sound stage but the Bijou3 had a deeper one. The Bijou3 is better in the sub bass section but in every other frequency range, I liked the PAA-1Pro better. I especially liked the highs as it was very clear, detailed and sparkled. There was no fatigue that you normally associate with this type of treble. I was quite impressed with the sound stage. This is the best ear buds I've ever tried out of the 5 I've owned.
 
I'll rate them as follows: E212>PAA-1Pro>Bijou3>Sony ear buds.
 
Conclusion
 
For the asking price of US$49, this is an item of very good value. If you are not into IEM's this is an excellent option to go with.

I would like to thank HiSound Audio for this review unit. This is my first review of an IEM.
 
To begin with, I compared the E212 to Crossroads Bijou3 which costs about $10 more.
 
Tested with
 
HP ProBook 4410S, GS3 with Noozxoide & Poweramp
 
Accessories
 
3 pairs of red ear tips, cable manager, flexible phone case
The flexible phone case supplied is good. A cable clip instead of the cable manager would have been more useful IMHO.
 
Design
 
I've been using the Bijou3 for about a year and although they look like they have very steady cables, the right side of the cable gave way just after a year. The cables on the E212 looks thinner than the Bijou3 (but now I don't think thickness of a cable is relative to its durability), it is braided and shorter than the Bijou3 cable but I like the cable of the E212 as it is less tangle prone and is is a good length when using with my notebook. The Y split is also quite thick and looks durabable. The phone jack is oddly angled but I like it as it is easy to insert even on a mobile phone with thick casing. The stress relief on the  phone end is twice the size of the Bijou3.
 
The phone body looks a bit cheap with a metallic plastic sleeve enclosing a shinny red body and comes supplied with 3 pairs of matching red tips. The best part of E212 for me is angle of the nozzle. This ensures a good fit and makes it sound vastly better than the Bijou3. More of the sound in the Sound quality section.
 
Isolation
 
The isolation of the E212 is about 30-50% better than the Bijou3 and it grips more firmly in the ear. This can be attributed to the nozzle design and the isolation is good. The sound quality is quite dependent on a good seal and a good seal is easy to achieve on the E212.
 
Sound Quality
 
The sound quality of the E212 is fantastic considering it is sold for about $38 on eBay and comparing it with the more expensive Bijou3. It is a lot better than Bijou3. The bass and the highs are much clearer and the sound stage a lot wider. This made picking out all the instruments in the song a lot more easier. EDM type music sounds great with these phones. Generally it was superior to the sound quality of Bijou3 in almost every attributes except maybe the very deep lows of the Bijou3. This is just after 20 hours of burn-in.
 
Value
 
I don't think it is easy to find any other IEM that is better than the E212 in it's price range. If so, I would like to know too.