Michael Berk

We've long been fans of CEntrance's portable USB DAC/headphone amp, the DACport; in an expanding market of bus-powered USB DACs, the venerable unit (along with its streamlined sibling, the DACport LX) remains a favorite of, and reference for, many reviewers of portable audio gear. Now they've gone ahead and put out a complete two channel system, of all things - the Audiophile Desktop System.

We've talked a fair amount in this space lately about how much of a difference a headphone amplifier can make in your portable listening. Whether it's correcting for out-of-whack output impedance or simply providing more juice for difficult-to-drive cans (here's looking at you, on-the-go planar magnetic fans), you can get a better experience for surprisingly little money, with a wide range of pocketable amplifiers on the market right now, ready to interface with your iDevices, Androids, and other portable media devices. Here we look at two interesting and affordable newish devices: the latest miniature amp from FiiO, the E02i, or "Rocky," and the latest incarnation of DigiZoid's unique ZO².

Everybody wants better sound out of their headphones, but (and here's a shocker, I know) not everyone wants to own a lot of hardware to make that happen, especially if you want to take your show on the road every now and then. Whether budget-tightening precludes your investing in a portable listening rig to supplement your home setup or you're just a minimalist, you might just be in luck. Low-cost audio gear leaders FiiO and Alpha Design Labs (the personal audio wing of high-end connector kings Furutech) have each introduced some impressive do-it-all devices that just might cover all of your digital listening needs.

The dirty little secret of the iOS aftermarket accessory world (at least where audiophiles are concerned) is that Apple's various bricks and slabs actually sound fairly good out of the box. Output impedance of the headphone jack is comfortably low (around 5 ohm for iPods and iPads most cases, below 1 ohm for the iPhone 4/4s), the onboard DAC isn't a slouch - totally adequate for on-the-go, and for everyday desktop listening, you could do a lot worse.

But that might not be enough for you.