Grado Sound, No Batteries!
The RA-1 AC is an incredibly compact headphone amp from Grado Labs. It is machined from a solid block of mahogany. An evolution of the fabulous battery powered RA-1, the RA-1 AC is designed for AC operation only. Like the RA-1, the sound is rich, musical and dynamic. Unlike it's battery powered brother the RA-1, the RA-1 AC is designed for home users who want the ability to leave their amp on all the time and won't miss the fuss of swapping batteries. Designed to be paired with the highest of resolution headphones, the RA-1 AC's modest price makes it accessible to virtually any headphone lover.
"This is such a nice job of product engineering by John Grado, I think
it earns a nomination for 'Dudely Product of the Year Award.'"
— Charles Hollander, Positive Feedback
"With a tube-like rendering of timbre and a sweet, relaxed sound, the
Grado RA-1 makes extended headphone listening a joy. Although
battery-driven, the RA-1 is more at home in your equipment rack or on
your desk than out on the road. A beautiful wooden case finishes off
— Robert Harley, The Absolute Sound