Members Frogger52 Posted April 14, 2009 Members Share Posted April 14, 2009 My drummer runs both dynamic and condenser mics. The board he's using has phantom power but no on/off for each individual channel. I looked on the Shure website and it stated: "A balanced dynamic microphone is not affected by phantom power. However, an unbalanced dynamic microphone will be affected. Although the microphone will probably not be damaged, it will not work properly." Does this mean if it's low impedence XLR that it won't be affected? Are there any other guidelines to prevent any problems/damage to equipment? Link to comment Share on other sites More sharing options...
Members Axisplayer Posted April 14, 2009 Members Share Posted April 14, 2009 Yes, low impedance dynamic mics are not hurt by phantom power. Link to comment Share on other sites More sharing options...
Members mtmra70 Posted April 14, 2009 Members Share Posted April 14, 2009 Phantom should be over the XLR inputs only, so if you use the TRS inputs (if app), there *shouldnt* be +48v. But check the manual. Another tip is to A) not gender bend into the XLR input unless you are sure its done properly or B) the equipment can handle +48v Also make sure the outputs are turned down when plugging into/out of the jacks with phantom power on Link to comment Share on other sites More sharing options...
Members Scodiddly Posted April 14, 2009 Members Share Posted April 14, 2009 If it's all microphones or DI boxes with XLR cables, no problem. If you have a special cable to plug in your iPod (or whatever) to XLR inputs then you might have a problem. Link to comment Share on other sites More sharing options...
Members Unalaska Posted April 14, 2009 Members Share Posted April 14, 2009 When using phantom power on all inputs make sure there are no 1/4 (other stuff output) to XLR (board side) cables. Common things would be keyboards, wireless mic recievers (1/4 outputs, many newer XLR outputs can handle +48v), effects processors etc. Link to comment Share on other sites More sharing options...
Members RoadRanger Posted April 14, 2009 Members Share Posted April 14, 2009 In particular the XLR line outs from certain bass amps are known to respond to phantom power by blowing out. When I use a line out from a keyboard or bass amp I always use an XLR to TRS cable at the mixer to use the mixer's line inputs. I've never seen a mixer that had phantom power on its line inputs. Link to comment Share on other sites More sharing options...
Members agedhorse Posted April 15, 2009 Members Share Posted April 15, 2009 In particular the XLR line outs from certain bass amps are known to respond to phantom power by blowing out. Not our amps, they are all fully phantom power protected. Link to comment Share on other sites More sharing options...
Members brent2_0 Posted May 9, 2009 Members Share Posted May 9, 2009 Not our amps, they are all fully phantom power protected. yeah but see what happends when you push 48 volts of direct current into a powered speaker generally as long as you dont have anything adapted to go into the xlr connectors you should be fine...IE a cd player with RCA-XLR adapters on it. Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 9, 2009 Members Share Posted May 9, 2009 yeah but see what happends when you push 48 volts of direct current into a powered speaker If it is phantom power, it would be sourced by the receiving device which would be the powered speaker itself. Some have phantom power available on their INPUTS when the mic switch is selected. In this case, the device DRIVING the powered speaker needs to be phantom power protected. You need to learn about how these devices work if you are going to make such comments. Link to comment Share on other sites More sharing options...
Members Coaster Posted May 9, 2009 Members Share Posted May 9, 2009 yeah but see what happends when you push 48 volts of direct current into a powered speaker generally as long as you dont have anything adapted to go into the xlr connectors you should be fine...IE a cd player with RCA-XLR adapters on it. phantom power applied to a speaker would hardly do anything due to current limiting. wouldnt even move the VC i bet. Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 9, 2009 Members Share Posted May 9, 2009 phantom power applied to a speaker would hardly do anything due to current limiting. wouldnt even move the VC i bet. He mentioned powered speaker, the trick is to route phantom power from an input to an input!!! Link to comment Share on other sites More sharing options...
Members brent2_0 Posted May 9, 2009 Members Share Posted May 9, 2009 No, i know how these devices work I was setting up a gig where we used a mackie 24:4 connected to EON15swell we had the phantom power on for the mics we were using, and by a problem with the console we found it also sending the 48 in the outputsI was making a joke, this obviously wouldn't happen normally. im Link to comment Share on other sites More sharing options...
Members Coaster Posted May 9, 2009 Members Share Posted May 9, 2009 doesnt the inputs on powered speakers (assume balanced) have a transformer and would negate phantom? Link to comment Share on other sites More sharing options...
Members agedhorse Posted May 9, 2009 Members Share Posted May 9, 2009 No, i know how these devices work I was setting up a gig where we used a mackie 24:4 connected to EON15swell we had the phantom power on for the mics we were using, and by a problem with the console we found it also sending the 48 in the outputs. {censored}ing impossible. Link to comment Share on other sites More sharing options...
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