It has a mix of (1)6CA4 Rectifier (1)12AX7 (1) EC83 and (4)6BM8 tubes inside. The status of the tubes is: working. Knight KG-250 Integrated Stereo Tube Amplifier. It works perfectly with good sound, however: It has a super faint hum on right channel audio output.
Welcome to my personal site. Everything here is only for my personal usage. No public interest.