I purchased these on sale and placed these in a homemade box. Matched up with on old 30w rms, 4ch Pioneer GMH120 amplifier and a new Pioneer DEH-S7200BHS head unit, with some adjustments, I am impressed. To be fair, I did not want to give less or more than 4 stars because of something that could be my error. I had to use the crossover feature on the head unit to produce what I thought was the best sound. I narrowed the range of frequency being sent to the speakers which is inside the range advertised for these RK1-113.
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