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Popular Splitters
Microphone signal splitters are used to route the audio signal from a microphone to multiple sources. In a live recording situation, for example, a singer's microphone signal may need to feed a public address system, an on-stage monitor amplifier, an analog-to-digital converter for recording on a computer audio recording system, or possibly even be sent out as a broadcast feed. The ART S8, Behringer MX882 Ultralink Pro 8, Millenium SP8 and T.Racks Eight are eight-channel microphone signal splitters currently on the market. Street prices range from around $100 to $200 at the time of this writing. To recommend one unit over another depends on your particular needs, as each has different features.
Phantom Power
Condenser microphones are predominately used in a recording studio environment, and a 48-volt power supply is required to power them. Dynamic microphones used for live performance do not need external power. For studio applications, consider a splitter model that has a built-in phantom power supply to power your microphones. A separate power supply will otherwise be required to use condenser mics.
An AC Power Consideration
Electrical power in buildings often leaves a lot to be desired when it comes to the "cleanliness" of the alternating current voltage. In an instance where you will be traveling to different locations for live performances or where you are installing a sound system in an old building such as a church, splitters such as the ART S8 are a good recommendation, as this unit contains ground lift switches to reduce hum and noise in such situations.
Multi-Function Capability
Whenever a product can perform more than one function, it can save money and also reduce the number of pieces of equipment needed in a set-up. The Behringer MX882 can fulfill both microphone splitting duties as well as some mixing tasks. In addition to signal distribution, the MX882 can raise audio levels, and in the mix mode, multiple mono inputs, each with its own pan pot, can be mixed to one main stereo output. Another nice feature of the MX882 is the LED level meters on each channel, giving a clear visual indication of the presence of an audio signal. This can be a great help in troubleshooting situations where a microphone's sound isn't coming through the audio equipment.