The preamplifier is a general-purpose amplifier with a miniature tube tone control. The output tube is a 5998, which has two triodes in one tube. The output is 8.4W x 2 on one side, for a total of 16.8W. The transformers are from Noguchi Transformer. Almost all parts have been replaced with new ones. The output terminals are 4Ω and 8Ω, and are the plug-in type. Includes RCA jack cables, an AC power cord, and two mini tubes for the preamplifier. The tone control produces good sound. Vacuum tubes: 5998 x 2, 6SJ7 x 2, 5AR4. Please only bid if you understand how to handle vacuum tube amplifiers. Wiring diagram and parts list included. Thank you for viewing.