Yeah, I guess this amp is making waves because, shortly after I got mine in December, the price went up. I believe we paid $169 for the amp and then it went up to $200. Now , of course it seems inventory is not keeping up with demand. I , for one, am glad Honda didn't have that issue with the F6B. I bet that Honda wished they had that issue.
I couldn't find the 4 channel one on Amazon either. Here is a link to NVX's site, but they list this amp at $299. That's a big jump in price.
http://www.nvx.com/mvpa4-4-channel-c...fier-400w-rms/
I install 2 polk marine 6x9 in each of my saddle bags with a small amp in left bag it sounds incredible I use the rear speaker output for signal so the fader and everything works as it should I install a switch on the left panel to turn amp off if I only want to play stock stereo, and yes I ride big time I can carry luggage for myself and wife for a week. I had the bike 1 year I have just over 11,000 miles