Hi everyone, So I recently picked up an Aguilar DB 659 preamp (thanks "fhodshon"!) and I am a bit perplexed by the effects loop and its various settings. I am hoping that I might get some guidance from those with more experience with this piece in particular and/or from those who are more aquainted with effects loops in general. First of all is the series/parallel option. I understand (I think) that the parallel option will combine the wet signal with the dry signal, but how do I control the relative levels with the send and return knobs? In Series mode (that's when the whole signal is passed through the loop, right?) what exactly do the send and return controls do? Further questions: If I am going to use a compressor in the loop, wouldn't it be best to run it in series? If I use pedals, should I use the regular setting or the -20db setting? Thanks for any help anyone might have to offer.