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<blockquote data-quote="Andrew Prince" data-source="post: 82183" data-attributes="member: 1808">Re: JBL SRX / QSC PL236 underpowered?&nbsp;Indeed, so when JB state 800/1600/3200 then the 800 is continuous.&nbsp;&nbsp;So this is represented by JBLs 1600 in the above spec. Therefore for typical program (a rock band), I need to drive the speakers with 1600W correct?And this number is therefore 3200.So in that case, how do these three numbers relate to my amp spec?FTC 8 Ohms per channel (20-20kHz, 0.033% THD) 725WFTC 4 Ohms per channel (20-20kHz, 0.033% THD) 1100WEIA 1kHz @ 1% THD 8 Ohms per channel 800WEIA 1kHz @ 1% THD 4 Ohms per channel 1300WEIA 1kHz @ 1% THD 2 Ohms per channel 1850WI read the FTC figures to be the real world performance of the amp (in other words, program) and the EIA figures to be not so real world (in other words peak).Basically, I&#039;m readying the JBL spec like this:1. They run at around 800W continuously / RMS / normal / safe.2. They should be driven at 1600W because the difference between 800W and 1600W is where you should be at.3. If you&#039;re an idiot and play cricket with your mics, chances are you will hit 3200W and still be safe, but really you shouldn&#039;t be an idiot.Hence, I conclude, 725W into 8 Ohms with a speaker rated at 800/1600/3200 is not enough power to do the job properly? Am I reading this incorrectly?&nbsp;The VRX system is similarly priced to the SRX system. In my world, idiots buy &#039;DJ Speakers&#039; and drive them with Peavey amps, wondering why they blow their HF drivers. Therefore I&#039;m a little lost as to why JBL feel the need to totally idiot proof their VRX boxes. The fact is, an idiot wouldn&#039;t spend £5,000.00+ on a VRX system with amps. After all, Ferrari don&#039;t limit their cars to 70mph so that idiots don&#039;t kill themselves and Rolls Royce don&#039;t remove all the leather just in case an idiot spills his coffee.&nbsp;&nbsp;I don&#039;t know about that. It was before my time. I just assumed that they would run all their amps at 1/4 power which would mean the amp is in a very comfortable place. The PA company I heard was doing this was SSE and their typical gigs at the time were arenas (10,000+ people in the UK).</blockquote>

[QUOTE="Andrew Prince, post: 82183, member: 1808"] Re: JBL SRX / QSC PL236 underpowered? Indeed, so when JB state 800/1600/3200 then the 800 is continuous. So this is represented by JBLs 1600 in the above spec. Therefore for typical program (a rock band), I need to drive the speakers with 1600W correct? And this number is therefore 3200. So in that case, how do these three numbers relate to my amp spec? FTC 8 Ohms per channel (20-20kHz, 0.033% THD) 725W FTC 4 Ohms per channel (20-20kHz, 0.033% THD) 1100W EIA 1kHz @ 1% THD 8 Ohms per channel 800W EIA 1kHz @ 1% THD 4 Ohms per channel 1300W EIA 1kHz @ 1% THD 2 Ohms per channel 1850W I read the FTC figures to be the real world performance of the amp (in other words, program) and the EIA figures to be not so real world (in other words peak). Basically, I'm readying the JBL spec like this: 1. They run at around 800W continuously / RMS / normal / safe. 2. They should be driven at 1600W because the difference between 800W and 1600W is where you should be at. 3. If you're an idiot and play cricket with your mics, chances are you will hit 3200W and still be safe, but really you shouldn't be an idiot. Hence, I conclude, 725W into 8 Ohms with a speaker rated at 800/1600/3200 is not enough power to do the job properly? Am I reading this incorrectly? The VRX system is similarly priced to the SRX system. In my world, idiots buy 'DJ Speakers' and drive them with Peavey amps, wondering why they blow their HF drivers. Therefore I'm a little lost as to why JBL feel the need to totally idiot proof their VRX boxes. The fact is, an idiot wouldn't spend £5,000.00+ on a VRX system with amps. After all, Ferrari don't limit their cars to 70mph so that idiots don't kill themselves and Rolls Royce don't remove all the leather just in case an idiot spills his coffee. I don't know about that. It was before my time. I just assumed that they would run all their amps at 1/4 power which would mean the amp is in a very comfortable place. The PA company I heard was doing this was SSE and their typical gigs at the time were arenas (10,000+ people in the UK). [/QUOTE]

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