You are probably referring to the KBA-280. This unit was released in about 1993, was rated at 140 wpc @ 8 ohms and had balanced inputs. If it is like most of the other Kinergetics amps of this time frame, it is "probably" biased in a somewhat "rich" Class AB mode and uses a pretty good sized toroidal transformer in the power supply. I do not have first hand experience with that specific model, so this is about all that i can pass on about it right now. If need be, i can dig up a little more info about it, but i don't know how much. Sean
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