I just picked one up from a local Kemperite.
I got it working no problem to my cab. I haven't checked the configuration, but it says "8 Ohms" in handwriting on the back, and both speakers are 16 Ohm.
The ISP works when I go Mono, but when I go Duel, I hear sound for a second, but then it cuts out.
In the Manual, it says it CAN go down to 4 Ohms, but if the power is too much, it can cut out to save itself? Something like that.
I will need to check the wiring, but can a dual 16 Ohm cab be an 8 Ohm Mono and 4 Ohm duel? If so, maybe the 4 Ohm Duel is too small for it.
Can I rewire it to make it more compatible for the ISP Stealth? I can solder.
P.S. The sound initially was anemic, but upon adding more Bass, Mids and turning the High and Low Shift back a tad, it really opened up spectacularly. Also, adjusting Clean and Distortion Sense to suit the guitar made it wonderful. So it requires a bit of an ear is all. Probably have to adjust by patch.
Are these global changes, or per patch changes?