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Junior Varsity
Inadequate Sub Power For a Venue... Tips/Tricks/Help
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<blockquote data-quote="John Roberts" data-source="post: 122113" data-attributes="member: 126"><p>Re: Inadequate Sub Power For a Venue... Tips/Tricks/Help</p><p></p><p></p><p>If you think about what is happening when we drive a loudspeaker bridged, you could drive one speaker lead with a 1kW amp, and the other speaker lead with opposite polarity 1kW amp and they do sum to 2kW in the speaker.</p><p></p><p>We really shouldn't offer satirical advice without emoticons to telegraph when we are teasing. Some people reading this may not get the humor. Ivan is joking about wire length! I have actually seen that question asked recently. </p><p></p><p>Kidding again.</p><p></p><p>The cascading two 1kW amps to make 1MW confuses behavior of voltage gain and power output... A 1000x voltage gain amp feeding a second 1000x will make 1,000,000x voltage gain. Power amps are voltage amplifiers so literally will multiply the voltage when cascaded, but power capability of the first amp is not used. FWIW the older Peavey amps (with unbalanced inputs) could literally accept the voltage output from another power amp, attenuate it down to reasonable levels, and use it as a valid input for the second amp. </p><p></p><p>I always find it amusing when people brag that they were able to get a decent sound out of a Peavey system, that stuff was engineered to make it hard to fail with, while there were always a few customers that managed to rise to that challenge. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 122113, member: 126"] Re: Inadequate Sub Power For a Venue... Tips/Tricks/Help If you think about what is happening when we drive a loudspeaker bridged, you could drive one speaker lead with a 1kW amp, and the other speaker lead with opposite polarity 1kW amp and they do sum to 2kW in the speaker. We really shouldn't offer satirical advice without emoticons to telegraph when we are teasing. Some people reading this may not get the humor. Ivan is joking about wire length! I have actually seen that question asked recently. Kidding again. The cascading two 1kW amps to make 1MW confuses behavior of voltage gain and power output... A 1000x voltage gain amp feeding a second 1000x will make 1,000,000x voltage gain. Power amps are voltage amplifiers so literally will multiply the voltage when cascaded, but power capability of the first amp is not used. FWIW the older Peavey amps (with unbalanced inputs) could literally accept the voltage output from another power amp, attenuate it down to reasonable levels, and use it as a valid input for the second amp. I always find it amusing when people brag that they were able to get a decent sound out of a Peavey system, that stuff was engineered to make it hard to fail with, while there were always a few customers that managed to rise to that challenge. :-) JR [/QUOTE]
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