The X 1 s are indeed very easy .
Mine are very easy in the bass region they stay above 5 ohm , with a 3,5 ohm minimum at 10 khz
Efficiency is a 93- 94 db average, i think it ll be no problem even with the ML 2 s .
I design/ do all the measurements for safety with a 2 times 10 watt class A transistor amp and it perfectly controls the woofers .
When clamping /changing cables while designing a X over , you dont want a clamp to come loose and accidentally short cut the CAT tube amp
The Zanden 300 B SET with 8 watts was not enough to control the woofers good .
Lamm has serious transformers which also doesnt hurt
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