It's a 12-watt, Class A, line integrated. EL84-based, push-pull. Details are on ebay: [URL]http://cgi.ebay.co.uk/Audio-Note-Oto-valve-amp_W0QQitemZ5806061068QQcategoryZ3280QQrdZ1QQcmdZViewItem[/URL] It's got a Border Patrol choke-regulated input filter and sounds great. Also, 6 Hovland caps have been added, not 4 as the ebay description states. My mistake.