Okay I'm not coming back to this thread unless the OP comes back. BUT, I will say this. I had my Alpine MRV-F345 hooked up to my CDT comps a while back. I had sold my Type-R subs so I was just running my passive front stage. I was looking to replace all my amps with Audison and my local shop gave me a good deal on the display LRx2.4. I had planned on getting the matching 1.1k for my new substage. Well, after hooking up the Audison to the CDTs, and setting the gains and Xovers the same, there was definitely a different sound to my speakers. I am in no ways an expert, nor can I actually describe exactly how the sound was different, but it was. Some frequencies seemed a little more pronounced, while other seemed more relaxed. That is ALL I'm going to say on this matter. However, that is comparing a 120x2 rated 2ch amp and a 75x4 rated 4ch amp. I can't even tell you guys which amp sounded "better" because they both had a unique sound. In the end though, I didn't think the Audisons were worth the price and I ended up selling it, went back to my Alpine for a while, then picked up my US Amps AX5600 I have now to go active. I did run the AX5600 with the CDTs passive for a few months too. Honestly it sounded pretty similar to the Alpine.
All that aside, I think I can honestly say that the Audison didn't have a very "natural" sound to it. I know the LRx is their mid-grade line, so I don't know if it is made with cheaper parts than the VRx series, but all I am saying is that there definitely was a difference in sound from my Audison and my Alpine/US Amps. It wasn't a HUGE difference, but I noticed, and I think it was easier to notice when I wasn't running any subs because I came to recognize the subtleties of my comps better.
I'm not agreeing with bulldogg, but just stating my personal experience as I believe anyone could have heard the difference. Like I said gains and Xovers were set the same, and no settings on my 9835 were changed at the time.