this is a copy of a post I made on TGP, some guys over there were poo-pooing the idea of loading the amp and using IR's in my Marsha comparo, so I made a quick clip to show what the loaded amp sounds like compared to the same amp mic'd:
Guys just so you can hear what a mic'd greenback sounds like vs. the loaded down amp/red wirez IR:
I did a quick clip. No mystery here- The 1st part is a PT100 proto, into a /13 2-12", mic'd with a 57, where the cap meets the cone about a 1/2inch off the grillecloth. Into an API pre into logic.
2nd part is the same amp sound, into a THD Hotplate set for load, (my Faustine is not here, so I used the THD which is a fixed load ) line out of Hotplate into my Apogee Ensemble, into Logic/Red Wirez IR with a Marshall 1960a and 57 1" off grille at cap edge. These are not gonna sound the same of course- different cab, different room, different pre (the Red Wirez are neve pres I think). And though I dig the Hotplate for what it is I prefer the Faustine.
But you can hear at least the same amp, through a real cab, mic and pre, and then the effect of the load into a IR.
Yes I prefer the real mic situation but I think most will agree the load/IR setup is far from "terrible" as a previous poster stated. It really captures the basic sound really well. And it's something you can use at 2 am. Through headphones. There's no eq here, no tweaking at all- just the raw sounds.
IR's are a viable option for lotsa situations where miking just isn't feasible. I am here to dispel myths!!!! This is my purpose!!
http://music.mp3lizard.com/peterthorn/
click on G12m/57 vs Red Wirez IR