What is a sumo nine worth today?

I have a sumo nine had it for years still in plastic in the box can anyone tell me about it and what it be worth today?

tamitha08-08-2019 1:57pm

roberjerman Details Discussions Posts This discussion Message User 4,319 posts 08-08-2019 at 03:23pm Copy Comment URL Report Comment Edit Delete Keep the Nine, get a pair of Quads - old or new - and you will be more than halfway to audiophile heaven!
roberjerman Details Discussions Posts This discussion Message User 4,319 posts 08-08-2019 at 03:05pm Copy Comment URL Report Comment Edit Delete There are six listed for sale on hifi-shark. Prices range from $550 (Audiogon) to $1200 (EBay). You can expect to get the minimum for it - but probably more if you can wait!
roberjerman Details Discussions Posts This discussion Message User 4,319 posts 08-08-2019 at 03:18pm Copy Comment URL Report Comment Edit Delete There is quite a bit about it on audioreview.com from different sites! An excellent amp from the late James Bongiorno (SAE, Dynaco, GAS). It runs hot (fan) and puts out 65 wpc class A. Ten output transistors per channel. Designed and produced about 1980. Can drive difficult loads (electrostats, planars) with ease. Sound quality competitive with today's four-figure amps. A true classic design!