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<blockquote data-quote="hispls" data-source="post: 8418957" data-attributes="member: 614752">Care to define &quot;box rise&quot;?&nbsp;&nbsp; How is it measured and quantified?&nbsp; If you don&#039;t understand IMPEDANCE or have seen some impedance curves of raw drivers and drivers installed you definitely should NOT be giving advice telling people to run their amp to half or quarter ohm.Because you are doing what you are doing in no way implies that your amp ever sees .5 ohm, nor that it is a safe condition that isn&#039;t risking breaking your equipment.&nbsp; Nor should it be construed to mean that somebody else running different equipment in a different box and different vehicle could wire to a .5 ohm nominal load and not actually have his amp see that and blow up very quickly.&nbsp;&nbsp; It simply isn&#039;t good for amps and isn&#039;t safe and is a bad idea unless you have a really good reason to do it and can afford the gamble.From Crescendo website: &quot;1 Year/1ohm comprehensive warranty with 2 year/.5ohm optional extended warranty available.&quot;IIRC they originally warrantied at .5 ohm and must have ran into trouble because they very quickly reneged on straight out no-questions-asked .5 ohm warranty.</blockquote>

[QUOTE="hispls, post: 8418957, member: 614752"] Care to define "box rise"? How is it measured and quantified? If you don't understand IMPEDANCE or have seen some impedance curves of raw drivers and drivers installed you definitely should NOT be giving advice telling people to run their amp to half or quarter ohm. Because you are doing what you are doing in no way implies that your amp ever sees .5 ohm, nor that it is a safe condition that isn't risking breaking your equipment. Nor should it be construed to mean that somebody else running different equipment in a different box and different vehicle could wire to a .5 ohm nominal load and not actually have his amp see that and blow up very quickly. It simply isn't good for amps and isn't safe and is a bad idea unless you have a really good reason to do it and can afford the gamble. From Crescendo website: "1 Year/1ohm comprehensive warranty with 2 year/.5ohm optional extended warranty available." IIRC they originally warrantied at .5 ohm and must have ran into trouble because they very quickly reneged on straight out no-questions-asked .5 ohm warranty. [/QUOTE]

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