Is the SP 13 modified especially for the passive pickups for the Stick? How about use with the ACTV-2 active pickups?
The Rane wasn’t specifically modified for the passive pickups exactly. The original unit had mismatched impedences because it was made for acoustic guitar players using both mic and piezo pickups. So the modification was made so that the impedences in both A and B channels match. I’ve never played with an ACTV-2 but, from what I’ve gathered from Greg Howard, using the SP 13 with ACTV-2 works just fine. The only difference is that you’ll probably be more likely to dial the EQ flatter with the ACTV-2 than you would with either of the passive pickups.