Members Telecruiser Posted December 28, 2009 Members Share Posted December 28, 2009 I know that phantom power is used for condenser mics. Can any harm come to dynamic mics by plugging them into a 48v powered input? Link to comment Share on other sites More sharing options...
Members dboomer Posted December 28, 2009 Members Share Posted December 28, 2009 As a rule it's not a problem. Some ribbon mics don't like it. Link to comment Share on other sites More sharing options...
Members IsildursBane Posted December 28, 2009 Members Share Posted December 28, 2009 As a rule it's not a problem. Some ribbon mics don't like it. It's only a problem with ribbons if something's either wired backwards or you plug your mics in through a TRS patchbay where some of the pins can momentarily be shorted. -Dan. Link to comment Share on other sites More sharing options...
Members twostone Posted December 28, 2009 Members Share Posted December 28, 2009 Most mixer I ever seen or used have a global phantom power anyway so I never had a problem if I use my small condenser Mic's for drum OH's along with my dynamic vocal mics in the past. Link to comment Share on other sites More sharing options...
Members IsildursBane Posted December 29, 2009 Members Share Posted December 29, 2009 One potential problem is if you've modded your microphone and removed the output transformer (as is sometimes done w/ 57's). The transformer blocks the DC voltage from getting to the rest of the microphone, but without it, it could get passed along to electronics that don't like it. -Dan. Link to comment Share on other sites More sharing options...
Members HenriN Posted December 29, 2009 Members Share Posted December 29, 2009 As a rule it's not a problem. Some ribbon mics don't like it. yeah, but we dont need phantom anymore for dynamics Link to comment Share on other sites More sharing options...
Members RoadRanger Posted December 29, 2009 Members Share Posted December 29, 2009 One potential problem is if you've modded your microphone and removed the output transformer (as is sometimes done w/ 57's). The transformer blocks the DC voltage from getting to the rest of the microphone, but without it, it could get passed along to electronics that don't like it.De-transformer'd 57s have no problem with phantom. Any dynamic mic that does have a problem with phantom:#1 won't actually be damaged by it.#2 is miswired or not of balanced construction and shouldn't be used anyways. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 29, 2009 Members Share Posted December 29, 2009 There is a potential problem with some ribbon mics, this is perhaps what Don's thinking, where the output transformer is center tapped and the center-tap may be grounded or coupled to the secondary in a way that causes polarization of the ribbon and it's toast. Link to comment Share on other sites More sharing options...
Members dboomer Posted December 29, 2009 Members Share Posted December 29, 2009 yeah, but we dont need phantom anymore for dynamics Actually there are now a few on the market that DO need phantom. Link to comment Share on other sites More sharing options...
Members RoadRanger Posted December 29, 2009 Members Share Posted December 29, 2009 Actually there are now a few on the market that DO need phantom.Yah, these were on closeout a while ago for $50:http://www.zzounds.com/item--BALBALL Link to comment Share on other sites More sharing options...
Members IsildursBane Posted December 30, 2009 Members Share Posted December 30, 2009 There is a potential problem with some ribbon mics, this is perhaps what Don't thinking, where the output transformer is center tapped and the center-tap may be grounded or coupled to the secondary in a way that causes polarization of the ribbon and it's toast. Any ideas which models? -Dan. Link to comment Share on other sites More sharing options...
Members Coaster Posted December 30, 2009 Members Share Posted December 30, 2009 There is a potential problem with some ribbon mics, this is perhaps what Don't thinking, where the output transformer is center tapped and the center-tap may be grounded or coupled to the secondary in a way that causes polarization of the ribbon and it's toast. best AH typo ever, and you got some goodun's. since the S isnt anywhere near the T (on my keyboard anyway), is this perhaps a Freudian slam on don? Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 30, 2009 Members Share Posted December 30, 2009 best AH typo ever, and you got some goodun's. since the S isnt anywhere near the T (on my keyboard anyway), is this perhaps a Freudian slam on don? Nope, no slam on Don. My laptop's keyboard is spaced a little differently and my fingers were cold. Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 30, 2009 Members Share Posted December 30, 2009 Any ideas which models?-Dan. Nope, just remember from some servicing many years back that there were some unusual interfaces. Link to comment Share on other sites More sharing options...
Members Dogoth Posted December 31, 2009 Members Share Posted December 31, 2009 I think a lot of ribbon mis are wired that way (I don't know that for sure just a belief of mine). With ribbon mics I not only shut off the phantom but either leave a condenser plugged into the channel until it completely looses signal or short one of the signal pins to shield (pin 1) with something metal to be sure any residual charge in any capacitor is compleatly bled off (I've killed ribbons that way can you tell - the ribbon pops like a fuse). I'm extra careful! With regular dynamics, phantom is no problem at all. It does however expose any bad connections you may have in your mic cabling/snake system (pop! pop! pop!). Link to comment Share on other sites More sharing options...
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