Sound Tech
How to choose the right mixer
Your particular application and number of necessary input and output channels can help you determine the size of mixer you need to do the job. Inputs consist of the total number of microphones, instruments and playback devices (cassettes, CD's, etc.) you will be using. The output section can be stereo or mono and should be able to provide for effects, reverb, tape recording, etc. Your application will also dictate additional features such as EQ, headroom, separate monitor mixes, etc.
Most sound reinforcement is delivered in mono to the audience. It is important to be able to control separate outputs and submixes even when operating a mono sound system. A properly designed mono sound system can provide even coverage throughout the audience area. Due to imaging, stereo sound reinforcement systems rarely project all programming equally to the entire audience area.
It is common to need one or more monitor mixes. The mixer you select will need one pre fader monitor send on each channel for each monitor system. Three monitor mixes are not uncommon in churches. The center platform needs a certain mix for the pastor or vocalist. At the same time, others on the platform need to hear vocals and/or instruments.
When selecting a mixer, be sure to allow extra channels for future expansion. Many purchases are made for 16 channel mixers, when a 24 channel is really what is needed to begin with. Whatever your necessary number is today, in a couple of years, it is likely to increase.
After determining your needs, select a mixer that will provide the best performance for the money. Avoid purchasing a mixer that is more than you can afford or understand how to operate. Remember, sound to the audience will not be that much different if the mixer cost $1,500 or $15,000. All of the added features on expensive mixers merely enable a knowledgeable sound person to mix with less hassle.
Once the right mixer has been selected, you will need cabling to reach your mixing position. Multi-cables, commonly called "snakes" are fairly expensive. Keep in mind, the best mix is usually achieved when the sound person is located in the audience. When the mixer located on the platform, less cabling is required, however, the quality of the mix usually suffers.
A properly designed console can make your new mixer a pleasure to operate. Allow room for storage and ancillary equipment, including cassettes, CD's, wireless mics, etc. And again, whatever your console space needs are today, in a couple of years, they are likely to increase.