Alesis 12R Typical Fader and Control Levels, Unity gain points, Trim gain ranges, Aux Send levels

Operating Instructions

Typical Fader and Control Levels

Ideally, after you have set the [TRIM] controls, both the Channel and Master faders should be run between the -10 dB and 0 dB position (about 1/2 to 3/4 of the way up the fader travel on the channels, and 3/4 to full on the master) if possible. This position gives the greatest amount of headroom and low noise. It also allows for any additional increase or decrease in level that might be required during mixing. Ultimately, the fader levels are dependent on the requirements of the mix; these suggestions are only a starting point.

Unity gain points

Unlike many other mixers, the Multimix 12R's [MASTER] fader is designed for unity gain (0) when the fader is up full, not at 3/4 or 1/2 of the travel. This allows you greater control to use the fader for smooth, gradual fade-outs. It also discourages inexperienced operators from using the mixer incorrectly.

The channel faders' unity gain point is at the traditional 3/4 point, with 10 dB of gain at the full-up position.

Trim gain ranges

The amount of gain in the TRIM circuit is shown on the front panel. On channels 1-8, the LINE input ranges from 10 dB attenuation to 40 dB gain, a range that should cover almost any line signal. The MIC input ranges from +10 dB to +60 dB gain, since the very low output voltages of microphones need to be amplified a great deal. The stereo channels' TRIM controls can be set from -15 dB attenuation to +15 dB gain. See the Level Diagram near the end of this manual for a graphic display of the gain structure of the mixer.

Aux Send levels

The nominal or unity gain points of the Aux 1 and Aux 2 controls are at the “2 o’clock” position. At the full clockwise setting, they have 10 dB of gain. However, in most applications you won’t need that gain, if the TRIM controls have been set properly. (See “How to Set Aux Send and Return Levels” later in this chapter for more information.)