Hantra, I took the guts out of a set of 900mhz RCA's bought on ebay on the cheap (receiver section) and added my own little power amplifiers (60W/ch) and adopted them to a set of Boston Acoustics CR-8's. It is very impressive for what it is. In testing, the transmitter/receiver tracked the signal well and with CD, it sounded better than the FM radio. The transmiter/receiver has a frq response of 40 to 18K and with this experiment, It served fine. Yes, the technology is here but no one seems to be utilizing it with better loudspeakers today. I could be wrong...maybe someone is. I could go to market with this..but I used them outdoors and it sounds mighty good considering...