ACIN branded tube amp. I believe it was measured at least 20w/channel before distortion. That's loud. The tubes are for the pre-amp section only and SS handles the power output section. I used for a couple weeks only and removed the rings around the center tubes for looks. Otherwise, it works fine and bluetooth connects easily. It also comes with a $30 digital to anologue converter to connect to your TV via optical cable. Local sale only in San Diego, CA. For more info https://www.amazon.com/Stereo-Hybrid-Tube-Amplifier-Integrated/dp/B078J8KJD9/ref=asc_df_B078J8KJD9/?tag=hyprod-20&linkCode=df0&hvadid=312098775000&hvpos=1o1&hvnetw=g&hvrand=7944428290595611979&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9031326&hvtargid=pla-584243110462&psc=1
