STAX is excited to present their newest solid state amp, the STAX SRM-400S Electrostatic Headphone Amplifier, as the successor to the SRM-353X. The 400S features custom-made low noise dual FETs installed on the first stage and additional FETs in the last stage. SRM-400S follows the design and the manufacturing method of the high end model SRM-700S, in which high quality FETs are installed in all stages of the amplifier.
HeadAmp is accepting pre-orders for the SRM-400S, which is expected to begin shipping in mid/late May 2021.
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Visit us at CanJam SoCal 2025 to hear the latest headphones on our CFA3 Deluxe. We'll be showcasing our newest amp along with our classic best-sellers from September 13-14 in Orange County, CA.
We'll be in New York City for CanJam NYC 2025. Come hear the full-production CFA3 power your favorite headphones February 22-23 in Times Square!