This cabinet’s amplifier is a 2 channel tube type chassis with 2 x 6550s (30 watts) in the rotary channel and 2 x 6V6 (15 watts) in the stationary channel.
The 50C was designed for use with Conn organs, but like the other “Conn” cabinets, it can be attached to almost any dual channel organ with the appropriate connector kit. It cannot, however, be used with a stereo organ as the cabinet has one rotary channel and one channel speaking through a 6×9 stationary speaker.
