It's been my experience that any octave pedal such as the Boss OC-2 (or 3), EBS Octabass, or any others I've tried don't track well and just don't sound good in general. It's certainly possible there is a 'trick' to using one I haven't yet discovered, but so far I haven't had much luck. On the other hand the onboard units built into both the Ashdown and Behringer heads tracks beautifully and sounds very, very good. I can't imagine that the built-in units are technically far superior. If that was the case, one would think that the designers would simply put the same circuit in a pedal and sell the heck out of it! Since listening to the way Marcus uses his octave pedal (yes, I know it's either a Boss or an EBS) I've wanted to add one for similar effect. However, they always sound distored and track badly. On the other hand, I did a gig this weekend where a Behringer bass amp was supplied and I was astounded at how good the octave circuit sounded. No distortion, near perfect tracking. Has anyone had the same experience I have? If so, does anyone know why? Am I missing something?