My Yamaha RX-V2400 quits when I use the automatic Yamaha-Parametric-
Acoustic-Optimizer (YPAO) to setup the speakers. The problem occurs during a frequency sweep, and other speakers do not cause the problem, only the Martin Logan Odysseys.

It is true, that the RX-V2400 is spec'd for a minimum of 6 ohms ouput impedance, and the Odysseys are spec'd for a nominal 4 ohms at lower frequencies, but drops to 1 ohm at 20KHz. It appears that the Yamaha detects the lower impedance at higher freq's and just trips the switch. Yamaha service people reaffirmed that the Rcvr won't drive the 1 ohm, and Martin Logan say "not my problem, the impedance spec is clearly stated".

Is there a service menu for the Yamaha that would let me defeat the overcurrent cutoff, or must I use an external amp? Any other solutions?