With iOS 7, you can now stream digital audio to the UHA-6S.MKII using the Lightning to USB Camera Adapter. This also works with the upcoming UHA760.
Read MoreMy latest design, the UHA760, is a high-end USB DAC and amplifier combo geared toward those who use USB to listen to source material at 44.1 kHz (ripped CDs, Spotify, etc). The amp incorporates a digital volume control, crossfeed with bypass, and an asynchronous sample rate converter which upsamples to 192 kHz. The UHA760 will be available this fall at a price of $439.
Read MoreThe output op-amp is the chip which provides amplification of the audio signal to the headphones. With some of my amplifiers, I offer a "standard" op-amp and a few other choices. I'm often asked how the op-amps differ in audio quality or which op-amp to pair with a certain set of headphones. My short answer: choose the standard op-amp, the AD8610. For a bit more information on how I arrive at this recommendation, read on.
Read MoreThe new UHA-6S.MKII is now in full production, with first units scheduled to ship in early June. The MKII has several improvements over the original model, including an additional digital input, lower output noise, higher output power, and a redesigned case. Now available for pre-order.
Read MoreThe bad news: UHA-6 and UHA-6S amps are officially discontinued. The good news...
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