Well the SF Cremonas are rated as 91dB sensitivity and a 4ohm nominal impedance speaker. The ML1.1s output 90wpc into 2/4/8 ohms. What is not clear is how the Cremonas impedance curve fluctuates across the frequency spectrum. If it is fairly flat around 4ohms than you should be able to drive it somewhat reasonably through the 4ohm taps of the ML1.1s. I would call Lamm and see if they have any experience (themselves or costomer experience) driving the Cremona Ms with this amp. Alternatively, you can give the folks at Sumiko (SF's US distributor/importer) for the Cremona M's impedance characterisitcs across the frequency band and ask them what they think about the ML1.1s driving them. If you look up the three reviews of the ML1.1 (Soundstage.com, Stereophile, and Positive Feedback.com), you will see that Marc Mickelson at Soundstage.com droveW W/P 7s with them and thought the combination was great. The W/P 7s are not the easiest load on tube amps, having a significant drop in impedance to 2.4ohms at 78Hz. So Ebm may have personal experience with his "not in this lifetime" comment, but it seems marck Mickelson did fine driving a somewhat tough speaker like the W/P 7s. Good luck.
