Originally Posted by Matthew Murray
While I"m aware that the Mackie Big Knob doesn't accomplish the headphone thing in so many words, it looks like it could be a handy little unit. Anyone know if it's passive or not when it comes to adding or depleting sound quality?
Have you checked Mackie's website?
If you go there you'll read that the Big Knob is not passive... whether that degrades the sound is debatable... (I don't know personally) but you if you do care about the quality of your output signal... an inexpensive box would be the SPL 2381.
It's not completely passive, but it is for what matters... there's no level adjustment trimmer for any inputs nor there is for the outputs (you need to balance up the sources and monitors using their own controls to avoid level discrepancies when switching between them)... this was obviously done to keep the signal path as simple (passive) as possible, so as to maintain the highest signal integrity.
If mine got stolen I'd get another one.
As for a cheap way of getting different mixes for tracking musicians, check OZ Audio Q-Mix HM-6.
Hope it helps... good luck!