Since my audiophile buddy and his wife are visiting for the weekend, I thought I would bring my Magnepan MMGs up from the basement to see how they sound with the SP13/ST120 combo. The ST120 powers my GR Research OB5s very well. They are rated at 91dB at an average of 6 ohms and minimum resistance of 4 ohms. The MMGs are rated at 85dB and a constant 4 ohms.
Will the rectifier, currently a Mullard GZ37, have to work harder to drive the MMGs? (I am also running Tungsol KT120 power tubes). I should add that the speakers are running off the 4 ohm transformer taps.
Should I put a Webber in for the MMGs?
Thanks in advance.