The PDX 6.1 is an older model, I'm not familiar with the new M models, just from my opinion 3 years ago when I did mine. I do love my PDX F4, very clean sounding amp. I'm still just using my kicker door speakers on the F4, I have had 2 sets of Focal's under my bed for almost 2 years waiting for install. Audio took a backseat to speed and power. Lol! I too kept my stock head unit for the factory look. I've never seen an aftermarket deck in person look good. Check out the RF 360 as well for processors.
Fri'd, Blown, currently being STROKED
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