Sorry, Pat! Let me try to explain. With the mixer set to +4 and every previous stage of the mixer set properly (just below overload), you'll notice that the PS1 Trim control has to be at or near zero (all the way down) to prevent overloading the PS1 Input. (Sometimes even then it will overload, hence the need for a pad.) With the mixer set to 'Mic' and the same proper settings at previous mixer stages, you're sending a much lower-level signal out of the mixer and you'll be able to turn up the PS1 Trim control to an optimum setting where it might blink red only on the highest peaks...quote:ok ...now i'm confused again
In any audio system, best results are achieved when each and every stage is set optimally to allow the highest possible signal into that stage without overloading that stage. This gives us the best signal-to-noise ratio. When using just the PS1, there are only 3 stages - Trim, Channel Level and Master Level. When using a mixer before the PS1, it's a bit more complex in that we need to set each channel's trim, all channels' faders and the mixer's master output to optimum levels and then, with that optimized signal, we can set the 3 stages of the PS1 - first Trim, then Channel Level and finally Master (listening) Level. Better?