STAX SRM-400S Electrostatic Headphone Amplifier 10% special the bass level on Sphear

the bass level on Sphear S has been slightly increased compared to the original Sphear for mobile use in noisy environments

Global voltage (100v–240v) without converter

and balanced sound signature

there’s no reason not to use the same philosophy that protects thousands in camera equipment for audio equipment as well

5mm Golden Adapter

STAX SRM-400S Electrostatic Headphone Amplifier 10% special the bass level on SphearMiddle class semiconductor driver unit is renewed. New DC amplifier which FET are installed in all stages. STAX introduces a new semiconductor driver unit SRM 400S, the successor model of SRM 353X. STAX custom made low noise DUAL FET is installed on First Stage. And FET is also installed on Last Stage. The characteristics of right FET and left FET are measured strictly. Selected FET are installed as well as SRM 700S. SRM 400S succeeds to the design