Great Amp, Bad Documentation
Giving this amp 4 stars. I''m using three of them for a hi-fi in a friend's 30x40 pole barn. One NU1000 drives two 8-Ohm front speakers; the second drives the identical rear speakers, and the third is in Bridge mode driving two 18-inch subwoofers.
Were it not for the documentation, I would give it 5 stars, easily.
Overall value is a 10+: amazing sound on a ridiculous budget.
Functionality is a 7: putting Speakon wiring diagrams on the back of the amp and NOT in the Quick Start Guide (QSG, apparently there is no actual manual per se) is silly and requires people to either predict this and transcribe the diagrams before rack mounting the amp, or dig around in the back of the rack afterwards to locate the diagrams, assuming they remember the diagrams are there; aaaand... two of the wiring diagrams appear to be wrong anyway, so who cares WHERE they're located.
Documentation gets a 4 and this is generous (I've been a technical writer since 1991 so I have some experience with technical documentation): it's so cluttered with translations that it's difficult to locate what you need, regardless of your native tongue, and even when you do locate something promising, explanations are simplistic, minimal; the QSG contradicts rear panel labeling regarding bridge mono power: rear panel says 1000 Watts @ 2 Ohms and QSG says 1000 Watts @ 4 Ohms; QSG never explains what Behringer believes the difference are between Bridge and Mono even as the QSG combines these terms in the Page 20 spec tables but separates them via a rear panel mode switch, offering one setting for Bridge and another for Mono.
Final caveat: the cooling fan is audible at low levels, so if you plan to use this amp out of a rack for hi-fi, fan noise might be an issue; mounted in a rack in a loud pro-audio setting, this is a non-issue. But thank goodness for the cooling fan as Class D can get warm.
OK... that's the bad news.
The best news is that this amp works very, very well, is stupidly light (if transporting it is a requirement), looks good, provides ample clean power, is easy to use once you realize the QSG will be little help to you and know how to wire Speakon connectors, and does it all for less than $200. Wow. Plus, you get Sweetwater's excellent customer service. Such a deal. Finally, I'd like to commend Sweetwater's Jared Kalish, who is a total pro and has been a trooper answering questions I've had.
I hope this helps your decision.