Check out this link. Aperion has a way to do it for powered subs. Any good powered speakers out there? This could work and it is pretty cheap.

http://www.aperionaudio.com/catalog/Wireless-Audio-Solutions,84.aspx

It appears that this Aperion Audio wireless device uses a USB cable for input into the transmitter--which to my layman perspective means it is digital and primarily designed for computer hookups and not pre/pro hookups whether digital or analog. Is this correct or is there a way to incorporate this into an Outlaw 990? Ideally, I would like to use it (or something else) to pipe zone 2 (which I know is analog) to additional locations wirelessly. Right now I have my zone 2 split and feeding (i) 4 downstairs stereo zones with an impedence matching speaker selector, and (ii) an outdoor stereo plus subwoofer system via a distribution amplifier and an Outlaw ICBM (which outdoor system, after a few hiccups, I have gotten to work nicely--and loudly!). I would also like to split my zone 2 for my upstairs, a large play room, and my garage, but I don't want to run more wires, don't want to add separate systems, and certainly don't want to have to run my main system for these ancillary purposes. Assuming the Aperion Audio wireless device (or something else) could be made to work for an Outlaw 990 zone 2, it would be a great solution for me.

It also has a stereo analog input which would allow the output of an AVP or AVR to transmit a signal to a powered speaker.

As for self powered speakers, M&K professional line had self powered speaker. Nearly any studio speaker you buy today is self powered. My audioengine 5's on my desktop are self powered and quite nice. It's nothing new, but hasn't really caught on in the home market except for a few select brands. I do think it's nice because that means the speakers have been sonically matched by the engineer who built the speakers. On the other hand people are very particular about the "sound" of their amps.

Powered speakers can be a very nice approach, and they are probably more common today than they have been in the past. One challenge with powered speakers in home theater is the wiring, though. Fronts and center are relatively straightforward, but surrounds are downright tricky. You need 120V power nearby, and most folks would prefer it to be very close at hand to avoid running an exposed power cord all over the place. That probably means hiring an electrician to come install some extra outlets specifically for each speaker. You also need to have different wiring to the speaker, since speaker cable can't really be re-tasked as a pre-amp cable. Combine those two limitations with the fact that many home theaters are using receivers that lack pre-amp outputs, and you can see why the traditional approach of passive speakers and centralized amplification has remained so dominant.

Off-topic: Those audioengine's are really something, aren't they? Last fall I convinced a dancer friend who DIY edits her own videos and stuff to splash on the audioengine 2s for desktop application. She was suspicious of the expense, but now continually thanks me for pressing her to bump up to decent sound.

They're quite nice. I tried a plethora of computer speaker systems and ended up returning all of them. I have the audioengine 5's matched with a 10" Outlaw Sub. Makes for a nice computer sound system. I have some KRK's for studio stuff as well.

Continuing the off-topi, I too have a set of the A5s paired with the Final S110 for Computer audio. They are great fed by a higher-end ASUS sound card and I even splurged on a silver input cable and made my own single speaker cable

My computer system is listed below. I did however make a set of low inductance 10 gauge speaker wires out of cat5 and really like them...

Technology marches on. Has everyone heard about the "Class D3" amplifiers that are built into the 2011 Pioneer SC-55 and SC-57 receivers? These units are getting high praise in the audio press for sound quality.

I continue to look forward to when a relatively small company like Outlaw can offer a powerful and great sounding product that doesn't heat up your room or crush your shelves.