I tried recording a classical guitar this week with an AKG P170 mic. With the trim set for what I thought was a good level, I ended up recording considerable bleed from outside the room - as well as finger movement on my right hand - all coming through clearly (regardless of mic position). I've never had this happen with my old Optimus 33-3017 or Behringer C2 condensers, nor with SM58 dynamic. So I figured I'd turn on the P170's 20db pad, and adjust the DP24 trim accordingly. Now I seem to be getting a good clean guitar sound (and no gain noise). At the risk of asking yet another pair of embarrassing questions, (1) does a 20db pad simply tell a mic to ignore the first 20db - or does it also actually narrow or change the pickup pattern of the mic, and (2) if the mic model isn't my issue, what the heck am I doing so wrong on the DP24 trim? Are there recommended trim levels for various mic models? I know there are better mics than the P170, but that's my price range until I hit the lottery.