Grado Labs Reference RA-1 Headphone Amplifier - Battery Powered

Enjoy Grado headphones in the best way possible-through Grado's new
RA-1 reference headphone amp. "With the Grado RA-1 handling the
amplification, music was rendered truer, clearer, and more lifelike
than I had imagined was possible," proclaims Willie Gluckstern in the
November issue of Audio. Machined from a solid block of
mahogany, the RA-1 uses a pair of audiophile op-amps with high-current
output capability and wide bandwidth. Two nine volt batteries will
drive the amp for a full 40 to 50 hours. Hook it up to any line source,
portable or in the home, and luxuriate in the warm, smooth,
full-bodied, rich, non-fatiguing sound.