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About the RA1
The Grado RA1 Reference Headphone Amplifier enhances the performance of Grado headphones with its warm, smooth, full-bodied, and non-fatiguing sound signature. Machined from a solid block of mahogany, it features a compact design and is optimized for line-level sources. The AC-powered version uses 100-230 VAC input with an outboard power supply, while the battery-powered variant runs on two 9-volt batteries for 40-50 hours. Both deliver state-of-the-art amplification particularly synergistic with Grado cans, though effective with others. A high-gain RA1-HG variant exists for headphones over 100 ohms. Now discontinued by Grado Labs.
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