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Features like the small lightweight size and USB recharging makes the Zo a pleasure to use. Having an inboard digital volume control with 32 steps also gives you the ability to run the Zo from a line out signal. For players without line out, you can hook up the Zo to the default headphone out and run it that way. It’s a simple device that does its job very well.
I realize that the SmartVektor™ technology is something that a lot of purists would probably be allergic to. Not me. I really like the sound of the Zo, the whole SmartVektor™ tech and the adjustable contouring ability. Obviously it would’ve been better if they can use higher quality components so you don’t lose the detail level and the frequency extension, but that would probably make the Zo a $500-$1000 device. At the current form and price, I think it’s perfect. It’s small, it’s affordable, and it brings a real improvement to the sound. Something that the masses can really enjoy and have a good time with. Even if you have a $3K desktop amplifier sitting at home, I would still advise you to go out and check out the Zo.
Gear used for review:
Ipod Classic, Hifiman HM-602, Shure SE-215, Etymotics ER4P, Sennheiser HD580, Superlux HD661, Goldring DR150.