Question about Sanken 48V Phantom Power Supply P11SPT Microphone

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Connecting phantom microphones without result

I have gl2800 and many microphones phantom power ....i connected them and switch48v without any signals .......

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If you have a volt meter check the supply is working correctly
48v dc phantom power should be found between these pins on any xlr mic cable.

pin 1 and pin 2
also between pin1 and pin 3

make sure you have amps turned down before checking/switching 48v phantom power

as if all is up and running it can cause big noise in the speakers.

let me know how it goes

Posted on Apr 29, 2008

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Posted on Jan 02, 2017

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C1000s hum/buzz on phantom power


possibly the microphone needs more power than your sound card can supply although I cannot imagine as the duet is a good piece of equipment.
Is the duet USB bus powered?
Have you tried another cable? Possibly one wire is defective which means that phantom power will superpose the audio signal. In this case you might hear a hum. By the way this results in 6dB of signal loss. This is why XLR plugs have 3 wires. If connected with a 1/4" jack it has to be a stereo plug (tip, ring, sleeve)

Mar 26, 2014 | AKG Audio Players & Recorders

1 Answer

Hi, I bought the Shure Beta 98H/C phantom powered clip on mic and was told(and read online) I could use the MX1BP as a battery preamp for the microphone when phantom power was not available. So looking at...


That will not work. The Beta 87H/C already has a preamp built into it. That preamp requires phantom power. The MX1BP is another preamp, so you would not need it, due to the preamp that is built in.

If you do not have phantom power available, then purchase an external phantom power supply.

Apr 18, 2011 | Shure MX1BP Microphone

1 Answer

I have a Yamaha IM8. I had a condenser mic hooked into channel one with phantom power on. I had to leave the room for a while and when I came back, I noticed some rather severe popping in the audio. I turn...


There is really no way for a condenser mic to damage the board UNLESS you break the ground and get a static discharge into the input. That can happen with any microphone and has NOTHING to do with the phantom being on or off. As phantom power goes on and off slight bias at the input preamps can make amps non-linear causing the raspy sound you heard. The Phantom LED means NOTHING as it shows the state of the phantom switch by connecting a 12 volt source through a resistor to the LED... It shows NOTHING regarding the state of the 48 volt supply. Each input circuit has two 6.8Kohm resistors to the swinger of the phantom switch 2nd pole that either grounds those or connects them to a filtered 48 volt source. As long as you don't have a static buildup there is NO need to turn phantom power on or off while connecting a condenser microphone. At each input when using the XLR jacks are two per side 470pf capacitors for RF bypass. For the XLR's there is a 10Kohm between the signal lines and two series 10mfd/50 volt caps in series of each input to block the DC, when using phantom power, from reaching the preamp stage. These caps have to charge and discharge when changing the state of phantom power so you should AVOID having the main amps being driven while changing the state of any phantom power. Always have the fader(s) down and any monitors down to avoid a thump and also the non-linear raspy transition as the input caps charge/discharge. So fix the microphone... don't know what type you have, but DO check the cable (first) as ALL three conductors MUST be good for a condenser mic to work on phantom power. A ground leakage or noisy connection will cause your symptoms. Use a SHORT known good cable right at the board to test the mic. The 48 volts is applied through the two 6.8K resistors between both the signal lines to the shield of your XLR cable. The microphone picks off the 48 volts with a similar circuit.
Now let's cover a very important thing regarding system safety: ALL, and I do mean ALL interconnected equipment MUST be powered from the same source. Professionals run a power cord back to their mixer right alongside the snake. This is to avoid ground bounce damage due to bad building grounds or ground faults.

Mar 22, 2011 | Yamaha IM824 24 Channel Mixing Console IM8...

1 Answer

I have set-up M-Audio microphone recently but I can't seem to figure out HOW to begin using it. I've tried every drop down and clicked every recording button while I was using the software. . . is there...


Without knowing your setup or the mic model, my guess is that you need to run a phantom power supply to the mic to get it to function. This is done either by using an outboard analog mixing console or mic preamp with a phantom power switch, or using an inline phantom power supply. The microphone plugs into the mixer or mic pre with the phantom turned on, and then into your DAW system.
The phantom power works with condensor microphones like the one you have. It sends a 48v signal to the microphone element, which in turn energizes the element and makes it function. Dynamic mics, like a Shure SM 58 for example, do not need the phantom power and will even ignore it if run on a phantom powered channel. condensor mics however must have it to function, otherwise there will not be any sound. Hope this helps. Good Luck.

Mar 19, 2011 | M-Audio Producer USB Microphone with...

1 Answer

I have a Behringer Mic C-1U and its not powering up!


How to Operate a Behringer C-1U

The Behringer C-1U is a USB condenser mic for recording individual instruments. A condenser microphone is a mic that uses vibrations produced by sound to change the distance of internal plates that produce signal. Condenser mics typically require an extra change, known as phantom power, to operate. Since the C-1U is USB powered, phantom power is not needed. The Behringer C-1U has a frequency response that favors sounds around the 10KHz range. This heightens the clarity of recorded signals due to the microphone's treble boost.

Things You'll Need:

* Computer with USB 2.0 port
* USB cable
* Recording software

Instructions

Turn on the computer. When the operating system loads, connect the microphone.

Install any necessary drivers for the C-1U. This will happen automatically when the device is connected.

Select the Behringer C-1U as an input source in any desired audio software. In Windows, click the "Volume" icon in the task bar to open the mixer. Select the C-1U as the primary input. On Macs, use the "Audio/MIDI Setup" in the "System Preferences" menu to select the C-1U as the primary input


Note: make sure you activate the phantom power on the mic. That's the only way to power up the microphone.

Have a nice day.

Feb 25, 2011 | Behringer C1U Microphone

1 Answer

What is the switch for on the Phantom power unit at the end of my AKG C747?


Hi,the switch for the phantom power on the microphone is to activation of the mic.Without the phantom being activated, the mic will not work.

It can only be activated with a mixer console that has a phantom activation on it. After connecting the mic to the mixer,activate the phantompoweronthe mixer and switch on the phantom power on the mic,and problem solved.

Note: Mic will not work if no phantom activated on the mixer.

Oct 20, 2010 | AKG C747 Professional Microphone

1 Answer

I'm buying a Rode NT1A, it comes with a shock mount, pop filter, xlr cable etc. What else besides a USB converter cable to I need to have this mic work it's full potential on a PC?


Hi, what else do you do think you will need? I don't think you will need any other thing except that before you use the mic, the switch for the phantom power on the microphone is to be activated .Without the phantom being activated, the mic will not work.

It can only be activated with a mixer console that has a phantom activation on it. After connecting the mic to the mixer,activate the phantom power on the mixer and switch on the phantom power on the mic,and problem solved.

Note: Mic will not work if no phantom activated on the mixer.

That all you will need .

Thanks for using fixya....

Oct 20, 2010 | Rode NT1A Professional Microphone

1 Answer

No signal to Digital Recoder


If the a95fp is a transformer that goes from xlr to 1/4inch, it will not pass phantom power. Your mic needs phantom power to operate.

Apr 01, 2010 | Behringer B-1 Professional Microphone

1 Answer

I have connected the samson mic to my computer. input not detecte


A condenser mic. requires "phantom power" usually supplied by a mixing desk. Without this, there will be no output signal from the mic.

Jan 12, 2010 | Samson C01U - USB Studio Condenser...

1 Answer

Just got a gxl2400, hooked it up with phantom power but no signal... just like if the mic was burned out... what could be the problem


Since you are using XLR cable, verify all conductors come through pin for pin. Not uncommon that a shield connection gets broken.

Then verify the phantom power is getting to the mic. Use a voltmeter between pin 2 and 3 each to pin 1. You should see a minimum of 9 volts.

Dec 25, 2009 | CAD Microphones GXL2400 Professional...

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