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Junior Varsity
When watts aren't watts!
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<blockquote data-quote="John Roberts" data-source="post: 23492" data-attributes="member: 126"><p>Re: When watts aren't watts!</p><p></p><p></p><p> </p><p>And thus the FTC 1/3 power pre-conditioning warm up, and other rules about power specs, legislated back in the '70s. </p><p></p><p>Rating powered cabinets by their power amps is ass backwards anyhow, what matters is SPL output. When you use separate amp sections for the different bandpasses, a more realistic approximation of a single external amp is those voltages superimposed on each other (if all drivers same impedance). So even more effective power than simple addition of the sundry amp sections. It is pretty common to use a lower impedance LF driver to get more output from internal amps where you need it. </p><p></p><p>This is like buying a vacuum cleaner based on how many amps it draws, not how hard it sucks. </p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 23492, member: 126"] Re: When watts aren't watts! And thus the FTC 1/3 power pre-conditioning warm up, and other rules about power specs, legislated back in the '70s. Rating powered cabinets by their power amps is ass backwards anyhow, what matters is SPL output. When you use separate amp sections for the different bandpasses, a more realistic approximation of a single external amp is those voltages superimposed on each other (if all drivers same impedance). So even more effective power than simple addition of the sundry amp sections. It is pretty common to use a lower impedance LF driver to get more output from internal amps where you need it. This is like buying a vacuum cleaner based on how many amps it draws, not how hard it sucks. JR [/QUOTE]
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When watts aren't watts!
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