I purchased one of these to use in conjunction with a pair of Bose L1 Compact’s, for private dance parties. I needed something that sounded like good quality home stereo equipment, but with the ruggedness of professional gear. Sweetwater was able to guaranty delivery of this equipment within a couple days, and they helped me select a better means to get everything hooked up. The communications from Sweetwater was outstanding. Sweetwater called and emailed numerous times regarding shipping status, etc. Kudos Guys! The sound is unbelievably powerful. However, Class-D amplification is not the same as good old fashioned Class-AB. Consequently, adding additional signal processing equipment, such a DBX sub harmonic synthesizer is easily able to overwhelm the amplifier. In addition, the low end response is not favorable for this type of equipment. In other words, this is speaker is not capable of reproducing very deep bass. I recommend running this speaker “clean,” and I would describe the sound as very punchy. The boost frequency control works well, but I found that turning the knob down to 40Hz seemed to provide the best results. Above this setting (or when the boost was disabled), the bass output sounded “muddy” and overwhelmed the Bose L1’s. With that said, the electronic crossover works great and it simplified connection to powered L1’s. I ran this speaker outdoors (85ÚF), at just below clipping for six hours continuously. The rear heatsink was barely warm, so you should not have any problems with it running hot. Nothing about this speaker is light—even the cardboard box is heavy. I have two suggestions for improving the product. It needs casters and an adjustable crossover would be nice. Overall, this is a nice product at a competitive and attractive price.