Pros: Gd size, detail-driven, spacious & gd seperation, neutral w/boosts off, bass boost GREAT, treble boost very effective, dead silent (treble boost off)
Cons: So-so battery life, treble boost attracts some noticeable hiss, front panel a bit crowded (though I do prefer having in and out on the same side)
Taking size, weight, shape, design, sound quality, and other pluses (EQduo, good looks, German engineering), this is up till now my ultimate choice (I STRESS: up till now) for portable amps.
Bass boost is a dream comes true even for a non-basshead like me.............it raises the level of the bass fairly linearly from the very bottom to midbass without sacrificing any bit of the bass details. It offers a real tight bass with plenty of oomph and slam, without any hint of flabbiness.
Treble boost, on the other hand, works not to extend the highs into the cloud........rather it serves mainly to raise sharpness and musicality.............emotional info in vocals (especially female vocals) get across more freely. It MUST be noted that the treble boost attracts a noticeable amount of hiss - it is not really discernable when the music is on but it is definitely there.
(Coming from RSAssss, 2Stepdance, ADL Cruise, GSlee Voyager, L3, and tried uHA120)
P.S. With all its goodness..........I'd say it's still a bit on the pricey side............hence -1 star for value. It's worth its price, yes, but definitely not the bargain of the year.