What's the output line level on the Dynavin? I have DSP and sometimes, when a particularly good song comes on, max'd out the volume. I have aftermarket front speakers (HAT Imagine 6.5's) and subs (JL 6" subs in factory box). Factory head unit is pretty strong at 5v or so max.

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Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual