![]() ![]() However on reapplying phantom power to any condenser microphone especially those that require a true 48 V polarization voltage, the microphone will turn itself back on with an ugly thump. ![]() If you short terminals 2 & 3 the microphone preamp might make a quiet exit. While this might be fine for line level sources, it certainly isn't for phantom powering a microphone. I'm sorry I must vehemently disagree with you. I suggested this method in my post above out of experience with using an XLR M-F adaptor with a shorting switch I made many years ago, and it works fine as a mute for all the mics I have tried, both phantom-powered and not. potential whatever the state of the phantom power, so shorting them together has no effect on the powering. XLR pins 2 and 3 of a mic that has a true balanced output are at the same d.c. Without taking one apart, it's not easy to tell if this is how the 49Q is configured, but for the switch to work silently, it would need some experimentation with load resistors from pin 3 to ground (around 33K - 47K) to balance the potentials at pins 2 and 3.Ä«oswell, post: 350699 wrote: Sorry, Remy, the information is absolutely correct. A configuration of this sort will indeed cause clicks and pops when used with the shorting switch, but the signal will nevertheless be muted and the phantom power unaffected. The current for powering the buffer is taken from pin 2 via that pin's 6K8 resistor, causing the expected potential drop and therefore a d.c. ![]() Some electret mics that use PP (or an internal battery) to power the FET buffer just drive the +ve output (pin 2) and decouple pin 3 directly to a.c. What I think is happening with the Audio Technica Pro 49Q is that it may not have a true balanced output. Sorry, Remy, the information is absolutely correct. This is not a dynamic mic and cannot be treated as such. You want to mute the microphone post-preamp not pre-preamp. That was blatantly bad information above. If you interrupt the Phantom power to the microphone and then reapply it, it'll cause a huge noise. ![]() RemyRAD, post: 350688 wrote: That is absolutely incorrect. I want to be able to smoke my cigarettes while filling my gas tank without any popping sound. If you can make more sense we can be more help. You generally can't mute the output of a microphone silently if it's a condenser microphone. And what are you plugging this microphone into? You can mute the output of a preamp silently. These frequently only require a 1 1/2 V battery for operation. Sure, you can do it if you are not using phantom power but, something like an electret self polarized condenser microphone. There is no sane reason to try to enable a push to talk at the output of a condenser microphone. You can however mute the microphone from within the preamp. This phantom power cannot be shorted out even post breakout resisters. You must keep the microphone energized with phantom power 100% of the time. You are not going to be able to effectively mute a condenser microphone at the front end of your preamp. ![]()
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