I bought this after seeing the amazing measurements on AudioScienceReview. There are cheaper options, but they don't work. Check out the ASR test and you'll see why it's good. I leave the front sheet of plastic on because it's easier to see the marks even though you don't need them. Good solid toggle switches, good volume control. I'll say it's getting hot so I need to install it on the E30 so it can dissipate the heat better.
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