Pros: Ultra portable, amazing bass contour settings, adds to the fullness of the SQ
Cons: Doesn’t drive well, fairly expensive, not as “clean” sounding as other amps out there

Packaging & Accessories: 7/10
Build Quality: 9/10
Design & Look: 9/10
Audio Quality: 9/10
Portability: 10/10
EMI (Interference with mobiles etc): 9/10 (higher rating means lower EMI)
Transparency (Plays same sound as source): 6/10 (higher rating means it’s close to the source)
Battery life: 8/10
Hissing: 8/10 (higher rating means lower hissing)
Value: 8/10
My final Rating: 10/10

Purchase Date: February 2012
Purchase Price: £72

If you are looking for a bass boosting amp – Look no further than the ZO2 – it really is the best portable amp I have had. When I mean portable, I really mean it. The thing is absolutely tiny, and almost unnoticeable.
I find the ZO2 serves its purpose well.
It is a “personal subwoofer”, but not only that, it adds to the “fullness” of your SQ.

That said, in comparison to its competitors, like the E11, the A10 – the ZO2 will sound a little more “muddy” and not as clean/lean sounding. It also is reasonably expensive – around double the price of the A10 & E11. I find that its main flaws are, its price, its “un-clean” sound, its gain settings.
For me, the gain settings are something that don’t really bother me, its “un-clean” sound is again something that isn’t the biggest issue for me, if I compare by A/Bing will I notice the difference – it isn’t night and day either and more so its pros outweigh its cons.

So, if you are looking for a truly portable amp, which in fact serves more as a bass booster, and adds a little fullness to the sound, then the ZO2 is a no brainer.
I would recommend this to anyone that has the budget and wants a decent/adjustable bass response.

I paid only $65 shipped for a ZO2v3, however I have to review it at the “going-rate” of $115.
However, it can now be bought from Top Dog Headphones for £80!

It measures approximately: 6.8x4x0.9cm

Pros
-Ultra portable, and very lightweight
-Amazing bass contour levels – adds a lot of bass if needs be -> literally as they say “your portable sub woofer”
-1 button does it all, which I find very convenient – adjust volume, gain settings, bass contours, on/off switch (can be seen either way as a pro or a con)
-LED light is nice (again can be taken both ways)
-Low EMI

Cons
-1 button does it all, adjust volume, gain settings, bass contours, on/off switch (can be seen either way as a pro or a con)
-LED light is nice (again can be taken both ways)
-Sound is a little more muddy, in comparison to the E11 -> not as clean
-Does not drive well at all on low gain – if anything it decreases the overall volume from source (high gain solves it, but still)

Some pictures of it!
Model used was Chimp

 

Here is my video review of it!

Go check out Their website

Enjoy!
–TotallydubbedHD