When you absolutely, positively need to be sure that what you're hearing in your cans is what you're hearing on your monitors is what's actually in your mix, you can't settle for some stock headphone output that's an afterthought on your interface. That's why you turn to a name like Grace Designs and their new m903 Headphone Amplifier and Monitor Controller for dependable volume attenuation and switching. Grace preamps are the very embodiment of transparency, so we trust that their m903 Headphone Amplifier is no different.

We took a look at the new Grace m903 at the recent 129th AES show in San Francisco. Perhaps the coolest aspect of the new Grace m903 (which replaces the older m902) is it's inclusion of a UBS interface that supports up to 24-bit/192kHz conversion (Windows machines will require a driver install) for some of the most audiophile computer playback you've ever heard.