Power mixer to a power amp.

SOURCE: what is the likely cause of the phantom power of a

The phantom power is used for condenser mics. MAKE SURE you do not plug in other mics or devices that do NOT have balanced, isolated outputs as they will short out the phantom power to others.

You should find between 15 and 48 volts between BOTH pins 2 and 3 of each mic connector when measured to pin 1 of the connector. There is about 6K ohms impedance from the phantom supply to pins 2 and 3.

IF you have an accident and connected high voltage to pin 2 or 3 it COULD back up and blow the bypass cap for the 48 volts.

Please note: ALWAYS power ANY interconnected equipment from teh SAME receptacle to avoid damage due to ground bounce in the event of a fault in a piece of equipment.

SOURCE: The audio kept cutting in and out while using the

The unit is SUBJECT to radio interference from other systems in the area such as high power taxicab radios for example and other services. 30 seconds might be about the time for a radio transmission. The system, while being interfered with, likely will NOT generate audible sounds and due to the squelch algorithm may MUTE the system.
Sorry, but you are a SECONDARY user per FCC definition and they are licensed and you are sharing bandwidth. You cannot interfere with them, but they can interfere with you. You should probablly get a UHF system that has less chance of interference. While recording, frankly I would be wired, not wireless. I am both an electrical engineer nd a HAM so I am aware of these problems.

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SOURCE: hey, i bought a new

I have a 412 speaker that works good at low volume with simlple set up when key boards turn up on mixing board the red peak light comes on and speaker shuts down i think its a protective shut of for overload but very easily triggered have to work with material too find a solution can any one confirm this shut off phenomena