I know and love that the M80V2s suck mega watts of power in the pursuit of that real sound. Occasionally I get wistful for the vaguely remembered warmth of those old 70's tube amps. As a qualified non-expert I thought a tube friendly speaker would have a relatively stable, high impedance curve, not dipping much below 3-4 ohms. Our beloved M80s do not fit this criteria. Anyone have experience with a tube amp M80 combo?