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Wilson Alexia’s give a EPDR load as seen by the amp, of an incredible low 0.9ohm in the bass, you really need D’Agostino type current pushing amps for this type of load, if you want to get the very best from the Alexia bass.
5th page under lab report.
http://www.absolutesounds.com/pdf/main/press/WA%20Alexia%20HFN%200313-4web.pdf
Cheers George