I am glade to see other people happy using pro-audio amplifiers. I have been using my qsc plx1602 to power my 2ch setup for a couple of months now. I have been extremely satisfied. I don't know why I haven't been using it longer. I have had it for a couple of years using it in my gig rack. A couple of months ago I was thinking about moving up to separates. While looking at all of the amps I noticed that most( in my price range) fell short when compared to the plx. Not just in power but thd and dampening factor also. Then all of a suden I realized that there was no reason to purchase a lesser quality amp, especially when I hadn't even tried the plx to see what it sounded like. I figured it would be noisy and unmusical, but I was WRONG! It sounds great. It has all the power I could ever dream of having. It is rare that I ever have it turned up past the first notch. I have no noise at any level I have tried it at, and the highs are crisp and clear, while the lows are deep and punchy.
I know that it is a bit excessive and if I was going to purchase a dedicated amp just for my 2ch setup I would go with less power. But this thing is great. With < 0.03% THD, distortion isn't even a consideration. The only thing to consider is fan noise. In quiet passages it can be an issue. Keeping the amp away from the listening position is the easiest option. Changing the fans would probably work, but because I also use the amp on gigs, I have chosen to leave them alone in fear of doing real damage. It does have a variable-speed fan, but that goes from not quite quiet to LOUD. I have never had it kick in over drive, or even put out hot air, when not at a gig. I have heard testimonials of people using racks of plx's for days during summer festivals in 100 degree + weather, so it might even be alright to run it without a fan under the ac with a light load.
It has both xlr and 1/4" inputs, and speakon, 1/4", and binding/bannana outputs. So it is a bit more flexible then the crown. I don't know how the cheaper rmx line is configured but I would assume it is similar. I know these plx amps retail for considerably more then the crown amps being discussed here, but they are CHEAP compared to modest hifi amps. At one time I noticed that qsc was selling factory direct refurbished gear at insane prices <$400 for the 1602, I am not sure if that is still happening. I couldn't find anything on their website, but you might keep an eye out at places like www.musiciansfriend.com
for b-stock products. The build quality on these things are great I wouldn't be concerned about failure. I haven't had to deal with customer support but I every thing I have heard about them has been great. So even refurbished or used you should be alright.
I would highly recommend qsc for anybody thinking about buying a pro amp for hifi use. Having the power your speakers want makes all the difference in the world. You haven't heard your speakers until you have given them REAL power.
I am running direct -> plx -> diy 2-way mini-tower speakers. Since its just 2ch I don't have a need for a processor so I just left it out. I like the minimalistic approach.
Here is a link to the qsc site.http://www.qscaudio.com/products/amps/plx/plx.htm