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Junior Varsity
Help me understand system limiting- setting it
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<blockquote data-quote="Tim McCulloch" data-source="post: 130436" data-attributes="member: 67"><p>Re: Help me understand system limiting- setting it</p><p></p><p></p><p></p><p>I'll let Ivan or some one else address the peak voltage limiters. For the RMS power limiters I like them to keep mostly out of power compression. Using pink noise (and hearing protection) you can drive a sub, LF or MF transducer until it stops getting louder, the trick is to find the point at which adding 3dB more signal does not get you 3dB more acoustic output. After a few more minutes you may find the level dropping a bit more. Measure output voltage, measure impedance, and use Ohm's law to determine Watts. That's the Reader's Digest version. You will be surprised at how low the number might seem if you were thinking of 1000W.</p><p></p><p>You will note that I didn't put the HF in this test method. I've yet to find a good way to this <em>in situ</em> that doesn't become an unintentionally destructive test. I recall some discussion on PSW about the relative merits of RMS limiting in the HF but don't recall a consensus.</p><p></p><p>Perhaps Bennett can add more to the discussion, since he peddles transducers... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p></blockquote><p></p>
[QUOTE="Tim McCulloch, post: 130436, member: 67"] Re: Help me understand system limiting- setting it I'll let Ivan or some one else address the peak voltage limiters. For the RMS power limiters I like them to keep mostly out of power compression. Using pink noise (and hearing protection) you can drive a sub, LF or MF transducer until it stops getting louder, the trick is to find the point at which adding 3dB more signal does not get you 3dB more acoustic output. After a few more minutes you may find the level dropping a bit more. Measure output voltage, measure impedance, and use Ohm's law to determine Watts. That's the Reader's Digest version. You will be surprised at how low the number might seem if you were thinking of 1000W. You will note that I didn't put the HF in this test method. I've yet to find a good way to this [I]in situ[/I] that doesn't become an unintentionally destructive test. I recall some discussion on PSW about the relative merits of RMS limiting in the HF but don't recall a consensus. Perhaps Bennett can add more to the discussion, since he peddles transducers... ;) [/QUOTE]
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