STAX SRM-400S Electrostatic Headphone Amplifier don't recommend eartips Frequency Response 20 Hz -

Frequency Response 20 Hz - 16 kHz Transducers High performance

2m (Y type)

including the capacity to reproduce Hi-Res Audio

5mm connection for most portable audio devices

1BA+1DD configuration

STAX SRM-400S Electrostatic Headphone Amplifier don't recommend eartips Frequency Response 20 Hz -Middle 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