I use this as a reference for my 2000w RMS car amp. Dual Audio allows me to add "punch" to my standard non-swappable (hybrid) BUT amazing sounding Sony radio. The voice prompt is a bit annoying but very hard to hear as it's a subwoofer. I laughed so hard I cried when I first heard it, but I'm sick of it. The MP3 player works well too, but I mainly use it as a bluetooth audio connection.
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