Hi Otto...
Thanks for the response.
The "target" that I was trying to describe is shown in this picture that brucek posted in another thread:
It seemed like my subs response was dieing off after 80hz, but I was plugging the soundcard output into the 6-channel analog inputs on the back of the preprocessor (right channel from sound card into sub input on the analog connections). I thought that bypassed any bass management or crossover settings inside the preprocessor. The reason I did it that way, instead of plugging directly into the sub was that I have two subs running off a mono output on the back of my pre.
Thanks again!
Rick