I bought a few of these to make my own to build a portable speaker with an amplifier. I was pleased with the performance of the amp and the sound quality. I have nothing to compare as I am new to this process. I also used one of the Vellman kits to build my own amplifier circuit and wanted to make sure it actually sounded as good or better than this one. I think for the price you get a lot of value for the dollar, and they're small enough that you can fit them into a fairly small speaker enclosure, which was a big factor for me.
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