Octal K8A 8-Pin tube-valve-base
The perfect ECC35-CV1985-6SU7-VT229-6188 for Audio & Studio Applications
It is extra handselected for low noise, low hum, low leakage
The tube puts no extra sound to the device - it sounds very neutral
S4A ® "Selected For Audio" is a registered Trademark by BTB
height:83mm-socket diameter:32mm-bulb diameter:32mm (info can varify!)
