I just seem to recall with my sometimes..umm..smoky memory that when the mod is used you can handle the high spls like with the phantom -but- you lose some gain i think it was. Now it was very little mind you, but it was still there. now.. An additional mod and or pre was mentioned to combat this issue? to me it seems like a lot of d.i.y. Just to get them up to where a phantom would have you in the (stock) firstplace. i have run my u853>ps2 in fos that made it hard to breathe due to the high spls...and i have never not even once came anywhere close to clipping. And they only thing i did with the setup is take it out of the boxes and plug everything in.