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<blockquote data-quote="Bob Carroll" data-source="post: 11758" data-attributes="member: 8615">The very small 5-input Behringer 302USB mixer does away with those awkward &quot;proprietary connector&quot; external power supply units.Instead, the 302USB mixer is efficient enough to just use USB 5-volt power. It does require sacrificing 48V phantom in favor of 15V phantom.What is a shame is that there is no 9VDC connection for use with pedalboard multi-outlet power supplies.I figured a quick way to connect my Joyo PS 2 power supply to the 302USB USB port but it would use 9VDC instead of 5VDC.Some music gear is very tolerant of voltage differences and some are not so tolerant.An image of a hypothetical hookup is shown below. Any idea how tolerant the 302USB would be to 9VDC power?<img src="http://lh6.googleusercontent.com/-4pdJrJh3Tfk/VKrQdJQj44I/AAAAAAAACto/aTiMsQbrrQU/w650-h549-no/9v-to-Behringer-302USB.png" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /> BTW, the powered USB hub could not be used as a hub if connected to the reverse polarity cable shown.I also found a 12VDC inline dimmer extension cable. I wonder if this dimmer could be used to reduce the voltage from 9 to 5 volts.<img src="http://lh5.googleusercontent.com/-7Ke6dWtD2dw/VKrQdCMOmQI/AAAAAAAACtk/xYc3iAnUHFU/w316-h230-no/1-barrel-inline-dimmer-extender.png" alt="" class="fr-fic fr-dii fr-draggable " data-size="" style="" /></blockquote>

[QUOTE="Bob Carroll, post: 11758, member: 8615"] The very small 5-input Behringer 302USB mixer does away with those awkward "proprietary connector" external power supply units. Instead, the 302USB mixer is efficient enough to just use USB 5-volt power. It does require sacrificing 48V phantom in favor of 15V phantom. What is a shame is that there is no 9VDC connection for use with pedalboard multi-outlet power supplies. I figured a quick way to connect my Joyo PS 2 power supply to the 302USB USB port but it would use 9VDC instead of 5VDC. Some music gear is very tolerant of voltage differences and some are not so tolerant. An image of a hypothetical hookup is shown below. Any idea how tolerant the 302USB would be to 9VDC power? [IMG]http://lh6.googleusercontent.com/-4pdJrJh3Tfk/VKrQdJQj44I/AAAAAAAACto/aTiMsQbrrQU/w650-h549-no/9v-to-Behringer-302USB.png[/IMG] BTW, the powered USB hub could not be used as a hub if connected to the reverse polarity cable shown. I also found a 12VDC inline dimmer extension cable. I wonder if this dimmer could be used to reduce the voltage from 9 to 5 volts. [IMG]http://lh5.googleusercontent.com/-7Ke6dWtD2dw/VKrQdCMOmQI/AAAAAAAACtk/xYc3iAnUHFU/w316-h230-no/1-barrel-inline-dimmer-extender.png[/IMG] [/QUOTE]

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