Butler, absolutely! I listened to the whole Dark Side of the Moon (great Japanese pressing) and regardless of it being one of the most difficult records to reproduce correctly, the amps did a spectacular job conveying the sheer scale of the masterpiece.
Martens are 89db with nominal 6 ohm impedance dropping down to 3.7 ohm ( I suspect it is lower, since I had to change the taps of my old JA50 to 1 ohm setting in order for them to drive the speaker). Even though the speakers are rather sensitive, it is still not easy for the amp to control two 10 inch drivers at 3.7 ohm.