Listening and Controlling

adjusted into the audible range you would never know. The Low Cut Filter is a 12 dB/oct filter with a roll-off frequency range of 10-350 Hz. Because extremely low frequencies use up amplifier head- room and cause resonant feed-back, it is a good practice to adjust this control to allow the least amount of low frequency energy that is tolerable. If the passive stage sound does not offer enough low-end then you may want to drop back some. It then becomes an issue of your personal prefer- ence.

This section will explain the LED Peak Level Meters, Monitor Master Faders, Headphones, and Wedge. These are located at the middle to bottom, right-hand portion of the board. In this section you will become familiar with the AFL (after-fader-listen) and PFL (pre-fader-listen) functions of your SRM. Before we venture further, let’s get a clear understanding of AFL and PFL.

AFL and PFL are functions which allow you to listen in, via wedge or headphones, on what your signal sounds like at various points within the SRM. The major difference in the two functions is that PFL is used to check the input signal post-EQ, whereas the AFL is used to check the outputs. In addition to listening to the signal, selecting AFL or PFL functions also changes the operation of the level meters presenting a visual level reference. NOTE: If the AFL or PFL buttons are not engaged then no output is heard through the headphones or wedge.

12.LED Peak Level Meters: Each of the 12 monitor mixes has a 12 segment LED Peak Level Meter with a -33 to +9 dB range. Each meter has a clip warning LED to indicate when the signal is within 2 dB of clipping. The 0 dB reference level of all meters corresponds to +4 dBu at its output. The R Meter (furthest to the right) is also used with priority for PFL metering.

13.Master Monitor AFL: This switch and LED combination connects the monitor mix signal (post-fader) to the AFL mix, the headphones, and the wedge outputs. The outputs work in pairs where the odd-numbered outputs go to the Left AFL mix and the even-numbered outputs go to the Right AFL mix. When only one of the two adjacent outputs is used the occupied output’s signal can then be found on both the Left and Right AFL mixes. For instance, if Master Monitor 1 AFL is engaged its signal can be found on both the Left and Right AFL mixes. If Master Monitor 2 AFL is engaged at the same time then its signal can be found at the Right AFL mix and Master Monitor 1 can only be found in the Left AFL mix. This scenario will work the same for Master Monitors 3 and 4,

5and 6, 7 and 8, as well as 9 and 10. This provides great capabilities for the SRM to be used in stereo monitoring and in-ear monitoring applications. The Yellow status LED illuminates to indicate that AFL is activated on that particular Monitor Master. The PFL function has priority over the AFL function.

14.Master Monitor Mute: This switch and LED combination mutes the Monitor mix signal to the output, effectively turning off the monitor(s). This is a great tool to have when problems arise since you can, selectively, turn on/off any or all monitors on stage. The muting of the signal is displayed on the meter but does not affect the AFL signal. When the Mute button is pressed, the red Mute Indicator illuminates.

15.Master Monitor Faders: These 100mm Faders control the overall monitor mix level found at the Monitor Outputs (#4 and #5). Faders are provided for Monitor Output channels 1-10 and L/R. The reference setting for this control is

0dB or unity gain.