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Message: <blockquote data-quote="MiniVanMan" data-source="post: 2959659" data-attributes="member: 573252">Yeah, there's a point where you need to overcome the mechanical properties of the driver.  For example the weight of cone.  There's a spec called Mms that's a variable within the equation for determining sensitivity.  It's basically a detractor due to the mechanical properties of the driver.So, I'd venture to say, than in a lot of situations, throwing 20 watts into an 8 ohm driver might not get the driver to full excursion as opposed to throwing 40 watts to the same driver but with a 4 ohm coil instead.After about 50 watts @ 8 ohms, you'll notice very little difference between an 8 ohm driver and a 4 ohm driver driven off the same amp, given the speakers are similar (i.e. Dayton RS180-4, and RS180-8)</blockquote>

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