Only became aware of the suhr reactive load http://www.suhr.com/amplifiers-for-electric-guitars/Reactive-Load/ after watching this Pete Thorn vid the other day https://www.youtube.com/watch?v=i770M9pM0_k Its basically a load box, so you can DI into a recording interface and use cabinet impulse responses.He talks about the speaker impedance curve,which plays a huge part in the tone.It got me wondering,as ive been messing about with the slave out and using cabinet IR's lately.I usually mic up the cab but was curious and i have a lot of cabinet IR's.So is the slave out essentially the same thing? Ive read that the signal includes the preamp and power amp but its dropped down to line level.Does it include the speaker impedance curve?I had the cabinet on at the same time while doing this of course.It sounds ok regardless.Usable if lacking the punch of a real speaker.