“ This review describes version with OPA209, but other ones should perform on par or better and probably without GSM noise issue. The amplifier is powerful enough to drive power hungry headphones such as orthodynamics, but also has very low impedance for balanced armature IEMs. DAC, while very good, is not the absolute benchmark - but that is to be expected in an integrated device....” --AstralStorm
“ Please see my full review here: http://www.head-fi.org/forum/thread/539012/review-leckerton-audio-uha-6s-usb-toslink-dac-amp I have rarely been so enthusiastic about any product as I am about this unit. I can't recommend it too highly. The brand deserves much more name recognition than it is getting. These should be on the short list for anyone looking for a portable amp. ” --sbradley02
“ I started looking for a headphone amp, to improve the Sennheiser IE8's, but mostly for the anticipated delivery of my Unique Melody Merlins. After thorough reading it came down to either the Pico Slim, Headstage Arrow 4G, ibasso T5 or the Leckerton Audio UHA-4. The Pico Slim was a bit too expensive for my taste, the Arrow to be a poor performer sound-wise and the ibasso T5 had a...” --ValentinHogea
The UHA-3, now discontinued, is a USB DAC and amplifier combo featuring a two-position gain control, rechargeable battery, and all-aluminum housing. Feature Summary Rechargeable battery, charged through USB 1/8″ analog input Automatic input selection Two-position gain select (+0dB/+18dB) Cirrus Logic CS4344 DAC 16-bit/48kHz USB digital audio Output driver...