Grado AC powered reference headphone amplifier.

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Perfect companion for pair of used Grado RS2 or new RS2x or RS1x

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"What a bargain! The Grado RA-1 AC is a killer compact design and has layers of musical elegance with all cans I used. Nothing bright, edgy, or lumpy about this design. You will look for the tubes, but find none. You get a huge helping of the sophistication and elegance of the all-tube E.A.R. HP-4 with the Grado AC, and that in just a 12 ounce, five-inch-long package!"

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