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<blockquote data-quote="drew gandy" data-source="post: 108106" data-attributes="member: 880">Re: Two Bose 802 questionsThe digital Gallien Krueger amps had notes about where you were not supposed to put your scope probe.&nbsp; I thought I would eventually blow one up by bumping something but never did.&nbsp; I don&#039;t remember actually creating flames either. I&#039;ve put some holes in speakers with screwdriver tip drills but that just made me feel cruddy inside; no fireworks or crazy sounds to numb the pain.&nbsp; On the topic of power amp duty cycle (and this is now pretty far from the 802 thread topic), I was not opposed to the duty cycle shift idea.&nbsp; I thought of it this way:&nbsp; Would I rather have an amp that can do sine waves all day long or an amp of the same size, weight and cost that can do higher peak voltage swings?&nbsp; After all, the vast majority of music has at least a 10db peak to average ratio.&nbsp; There aren&#039;t many music styles that use high level sine waves in the music and none, that I&#039;m aware of, that do so above a hundred Hz or so. I agree with JR that, in the context of sound systems overall, high duty cycle is only needed for fringe use cases.&nbsp; In the end the amp companies figured out that you could make a lower cost amp and sell it with higher power ratings than previously which wasn&#039;t exactly the way I was thinking about things.&nbsp; But that&#039;s economics.&nbsp; I&#039;m interested in the new CAF system that Pat Brown is pioneering.&nbsp; If it can see widespread use it should help put some of the differences between amps into perspective.&nbsp; As far as Bose 802 goes, I&#039;m surprised there isn&#039;t a measured raw response on the web somewhere.&nbsp; Google image search isn&#039;t finding it, at least in the first few searches I&#039;ve tried.</blockquote>

[QUOTE="drew gandy, post: 108106, member: 880"] Re: Two Bose 802 questions The digital Gallien Krueger amps had notes about where you were not supposed to put your scope probe. I thought I would eventually blow one up by bumping something but never did. I don't remember actually creating flames either. I've put some holes in speakers with screwdriver tip drills but that just made me feel cruddy inside; no fireworks or crazy sounds to numb the pain. On the topic of power amp duty cycle (and this is now pretty far from the 802 thread topic), I was not opposed to the duty cycle shift idea. I thought of it this way: Would I rather have an amp that can do sine waves all day long or an amp of the same size, weight and cost that can do higher peak voltage swings? After all, the vast majority of music has at least a 10db peak to average ratio. There aren't many music styles that use high level sine waves in the music and none, that I'm aware of, that do so above a hundred Hz or so. I agree with JR that, in the context of sound systems overall, high duty cycle is only needed for fringe use cases. In the end the amp companies figured out that you could make a lower cost amp and sell it with higher power ratings than previously which wasn't exactly the way I was thinking about things. But that's economics. I'm interested in the new CAF system that Pat Brown is pioneering. If it can see widespread use it should help put some of the differences between amps into perspective. As far as Bose 802 goes, I'm surprised there isn't a measured raw response on the web somewhere. Google image search isn't finding it, at least in the first few searches I've tried. [/QUOTE]

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