I purchased this kit a couple of years ago however; due to other speaker projects, these were not used very much and when in use were powered with 100 watt class D amp. A couple of days ago I decided to power them with a class D 500 watt amp and it was like night and day. The bass was there and the highs sounded good. I have built several speakers and I have to say this kit is a bargain for the price. If you have the space for these, I would recommend to build the cabinets and see for your self. [...read more]