It's an ear speaker and driver unit system. These STAX ear speakers have a reputation for their outstanding subtlety unique to the condenser type. The fine nuances of vocals are clearly audible, making it ideal for late-night monitoring. As for the exterior, the ear pads have been replaced, but there are peeling off and the adhesive sticking out. There is crease in the head pad (Katsutsugu Hiura)
Maintenance information:2023.8.29 sound output confirmed
Accessories: power cable SR-λ original box
Main specifications: SRM-1 solid state output 2 lines W150 x H87 x D370 mm 2.0 kg SR-λ electrostatic type 8 to 35,000 Hz 102 dB cord length 2.5 m