Here is a screenshot of the same information. Here is a webpage showing the microphone:Īudio Control CM-10 measurement mic webpage Replacement mics are available directly from Audio Control for $145 list price. They aren’t expensive and this way you will have a calibrated RTA and you will be able to trust the SPL readings on the device. My recommendation is that if you own one of these units and have damaged or lost your original CM-10, purchase a replacement CM-10 microphone. Obviously the goal of any audio measurement system is to provide accurate information. Any deviation from that recipe might provide false information. I would consider the CM10 mic as mandatory personally because you know that your entire system will work as designed. While it’s possible that mics other than the CM-10 measurement provided with the Audio Control SA 3052 / 3051 units will work for measuring frequency but you will be giving up your “SPL calibration” in the process. Notice that most of the “high end” mics all require 48vdc phantom power but most don’t require nearly as much current as the Earthworks product line with the exception of the AKG 451E which can use an measurement grade omni capsule. This could manifest itself as distortion or other unstable output.

If your phantom power supply can’t provide enough current or voltage you may experience poor performance. Note that all Earthworks mics require 10ma of Phantom power 48v to operate correctly. Sound Devices – Phantom Powering Basics webpage To get a sense of the phantom power requirements of popular condenser mics, here is a chart of various mics phantom power requirements put together by Sound Devices. Here is an explanation about phantom power:

Many condenser mics will operate with less than 48vdc phantom power but some will not operate to their full specification without 24vdc or 48vdc and enough available current. So the SA 3051 / 3052 units provide 12vdc phantom power. This is what the user manual states for the input specs: I just received and email asking if an Earthworks M30 or other mic can be used with an Audio Control SA 3052 RTA.

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