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Junior Varsity
JBL PRX series auto-off disable?
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<blockquote data-quote="Andrew Broughton" data-source="post: 147107" data-attributes="member: 318"><p>Re: JBL PRX series auto-off disable?</p><p></p><p></p><p>That makes no sense at all.</p><p></p><p>First, who would install small MI-grade powered speakers permanently? Much more effective from a control and maintenance standpoint to use unpowered speakers and put the amps in an amp room where you can easily control the speakers.</p><p></p><p>Second, the switching power supplies in modern amplifiers would draw almost nothing when the speakers aren't producing sound. If they are using some sort of inefficient power supply that draws significant power even when the speaker isn't being used, then that's just poor design.</p><p></p><p>Third, in a permanent install, if you're going to all the trouble of running signal and power to each speaker, it's nothing to wire the AC to be sourced from a breaker or switch that can kill the power to the speakers if for some reason that's important to you.</p><p></p><p>Fourth, why would you want power to your speakers all the time? What if someone unplugs something at the source end? What if there's a problem with the wiring and a nice 60 cycle hum starts blasting through the speakers? What if one of the speakers' amps fail and it starts putting out noise or a buzz, or amp starts smoking?</p><p></p><p>None of what you suggest is a really a good reason for this terrible "feature", ESPECIALLY since it's not defeatable.</p><p></p><p></p><p></p><p>Sent from my iPhone</p></blockquote><p></p>
[QUOTE="Andrew Broughton, post: 147107, member: 318"] Re: JBL PRX series auto-off disable? That makes no sense at all. First, who would install small MI-grade powered speakers permanently? Much more effective from a control and maintenance standpoint to use unpowered speakers and put the amps in an amp room where you can easily control the speakers. Second, the switching power supplies in modern amplifiers would draw almost nothing when the speakers aren't producing sound. If they are using some sort of inefficient power supply that draws significant power even when the speaker isn't being used, then that's just poor design. Third, in a permanent install, if you're going to all the trouble of running signal and power to each speaker, it's nothing to wire the AC to be sourced from a breaker or switch that can kill the power to the speakers if for some reason that's important to you. Fourth, why would you want power to your speakers all the time? What if someone unplugs something at the source end? What if there's a problem with the wiring and a nice 60 cycle hum starts blasting through the speakers? What if one of the speakers' amps fail and it starts putting out noise or a buzz, or amp starts smoking? None of what you suggest is a really a good reason for this terrible "feature", ESPECIALLY since it's not defeatable. Sent from my iPhone [/QUOTE]
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JBL PRX series auto-off disable?
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