Posted on 
Dec 30, 2004 02:39 pm on the 2442fxpro you can only use one effect at a time and it acts like an aux send/return on aux 3. you can use aux 3 for something else if you want but, but all you have to do is turn the fx send up on the fx channel, then you have that fx running through aux 3, just turn that knob up in the channel and it will mix.