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The Basement
speakers start on fire at Local Hockey Rink
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<blockquote data-quote="John Roberts" data-source="post: 50102" data-attributes="member: 126"><p>Re: speakers start on fire at Local Hockey Rink</p><p></p><p>Wouldn't that be speakers end on fire? </p><p></p><p>While I suspect some share of DC300s failed DC (common result of shorted power transistor), but most amps use FUSES (now circuit breakers) so not typically fire starters (a focus of UL safety testing). However, if the DC comes in through an input, the DC amplifier will not be stressed and put out the amplified DC until something downstream fails. A DC300 pegged full positive or negative output will not be internally dissipating any significant power in it's output devices so keep on trucking, as long as the current draw doesn't take out the fuses. </p><p></p><p>IIRC there are safety agency rules dealing with flammability of speaker cabinets used in proximity of internal power amps that may have very hot parts during faults. </p><p></p><p>I'll forgo the way too easy second guessing in hindsight. </p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 50102, member: 126"] Re: speakers start on fire at Local Hockey Rink Wouldn't that be speakers end on fire? While I suspect some share of DC300s failed DC (common result of shorted power transistor), but most amps use FUSES (now circuit breakers) so not typically fire starters (a focus of UL safety testing). However, if the DC comes in through an input, the DC amplifier will not be stressed and put out the amplified DC until something downstream fails. A DC300 pegged full positive or negative output will not be internally dissipating any significant power in it's output devices so keep on trucking, as long as the current draw doesn't take out the fuses. IIRC there are safety agency rules dealing with flammability of speaker cabinets used in proximity of internal power amps that may have very hot parts during faults. I'll forgo the way too easy second guessing in hindsight. JR [/QUOTE]
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