First off a big thankyou to all axiomites for their inputs on this bi amping principle. I am learning a lot, and have cleared up one point of inaccuracy in my thinking as a result.My hypothetical thinking in terms of trying to do a biamp on the m80 was to do with an idea surrounding any vintage type super clean amp whose distortion characteristics went postal the minute the the resistance load dropped below 8 ohms at any point on the frrequency spectrum.If the m80's impedance vs frequency sweeps with the top and bottom of the m80 separated raised the lowest impedance above the 8 ohm threshold then get an identical amp and do a biamp,giving each amp a load it can comfortably handle.