AI-generated product photo — not official manufacturer imagery.
AmplifiersHeadphone Amplifiers
Estimated price (community-sourced)
$850 - $1,299
Around — community and catalog average, updates slowly
About the SRM-400S
The STAX SRM-400S is a semiconductor driver unit for STAX electrostatic earspeakers and the successor to the SRM-353X. It uses an all-stage FET DC amplification design with custom low-noise dual FETs in the first stage and is positioned as a middle-class model intended for users moving up from entry-level systems or pairing with advanced Lambda series headphones. It emphasizes high-resolution sound, dynamic low-range reproduction, and balanced tonal performance.
Specifications
Key Specifications
Power: 400W
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