Feature:
I like the clip limiters at the 2 different frequencies, and I like that they can be run independantly. (Left side can be on while the right side is off)

Quality:
The best amp I've ever used in my entire life.

Value:
Great for the money!

Desirability:
This was on my high priority list for a while (until I actually purchased one about 2 years ago), now it's back on my list to power my JBL MPro subs!

Sound:
The best amp ever! Sounds great 100% of the time. I recommend it to everyone for any use! (Studio, Mobile, Club)

Support:
n/a

Overall:
Pay the money and I guarantee that you will not regret your purchase!

Feature:
i wish there was a 20hz subsonic filter because my subs play down to 22hz.

Quality:
very solid build.

Value:
awesome value i use it in my home theater pushing my custom sub box. more than adequate power.

Desirability:
solid fit and finish.

Sound:
i use this amp to power custome sub box and it does a great job.

Support:
never needed support

Overall:
very well built amp. qsc specifies the rmx 1850 to be more stable in 2 ohm loads for long hauls. wish i knew that before purchase, but no biggie because once i plugged amp in i fell in love.i am very satisfied with the rmx 2450.

Feature:
Everything you need. Includes limiter, bridging, parallel inputs, and low cut filters (30 or 50 Hz) selectable by DIP switches. Also has binding post and Speakon outputs, XLR, 1/4" and terminal inputs. The cooling fan adjusts to needs. I've never found it to be obtrusive.

Quality:
This thing is built like a tank (and feels like it!). The only complaint is the small gain controls. They lack detents and seem a little cheap. But, overall, an excellent build quality. I've encountered no problems so far.

Value:
I've seen other amps in this power/performance range for cheaper. But, I think there's something to be said for having a QSC label on the amp. I'm consider this unit to be of great value. If you don't mind lugging around a 45 lb amp (multiplied by the number you have) in your rack, I think you cannot do better.

Desirability:
No sex appeal, but I don't find power amps particularly sexy FWIW. It has loads of power, is clean (as would be expected for a QSC amp), and is cheap. I would not compare it with more expensive amps like QSC's PLX line, or the Crown Macrotechs, but this amp delivers what it advertises.

Sound:
Nice amp for the money. Good power (though not stable into 2 ohm loads when bridged... if you need this, get the 1850HD version). Reliable so far, and very quiet. It's a bit heavy compared to other more pricey options (e.g. the PLX series or the Powerlight amps), but much cheaper. No complaints.

Support:
I've not run into problems. But, I've heard good things about QSC support, and I'm happy they offer a six year warranty on this. That's almost unheard of for a power amp. And considering the duty these amps will likely see, having a good warranty is a good thing.

Overall:
Realistically, I never expected this amp to be "the best," whatever that means. I don't expect it to drive 3 2 x 18 sub cabinets per side. But, it meets my needs just fine. I plan to purchase more in the future as I expand.

Size power performance is all here. I have 3 of them and I have 2 PLX's don't get me wrong, the PLX is a superior amp however, that is spec'd on paper. My ears and my audience ears can not tell the difference..... Kinda thinking thats what counts eh?

We used it for a recent Celtic live gig. Awesome sound quality. No noticeble distortions at any range, even when we pumped some real strong drums through it. And it just looks cool. Works great with the Soundcraft M12 Spirit mixer.

Feature:
Great features. I have had the rmx 2450 and 850 since 2001. Still, never a problem.

Desirability:
Time to upgrade again. I love the rmx 5050. I will use that to power all 4 of subs, and use this one for the main cabinets.

Sound:
Best sound for its buck.

Ease of Use:
So much flexibility with its features in the back. The limiters and the parallel mode. Just think of it. With one cable, you can power up to 8 speakers! Wow.

I have two QSC amps.

The RMX2450 and RMX1450.

These two amps combined plugged into 6 Cerwin Vegas, 4 highs and 2 lows are pretty powerful for its size. They never give up on me and they are always cool even in hot weather conditions. It does not matter if i am indoors or outdoors. I love them.

I would recommend them.

We have two of these outstanding amps in our karaoke service. one runs our Soundtech KS56C three way system. and the other one runs our Soundtech LS18R Subwoofer system. I run these amps wide open each and every night with out fale. I feel for the money you can't go wrong!