The instructions I'm following state the items below, but the PN520D amp I got doesn't have any speaker harness ?

8. On the crossovers in the fairing there is a set of wires coming out the bottom of it. The wire with the white stripe is your positive (+) wire and the other is negative.
9. Connect the left crossover black/white wire to the green/black wire on the PN4.520D speaker harness.
Connect the left crossover black wire to the green wire on the PN4.520D speaker harness.
Connect the right crossover black/white wire to the violet wire on the PN4.520Dspeaker
harness.
Connect the right crossover black wire to the violet/black wire on the PN4.520Dspeaker harness

 

i think i figured it out, no harness, but a block... i got sound !!

 

lol.. glad you got it figured out sir. holler if you need further help

 

So I am trying the ear test to set gains, but it says with them all the way down, and bass / treble at half to turn it up until you hear distortion. Maybe its me but I've tried several songs and can turn it all the way up without distortion ?

I have the gains right aroung 10' o'clock, and things seem ok, but I may try and get out my MM..

Also, the back speakers (polk mm651), seem to have little protection with the grills they come with. Any reason I should be concerned ?

Final Thought - I hope the neighbors don't mind me fiddlin on a Sunday afternoon.... WOWOW these babies are pushing some noise !!

 

Kind of unusual for a stock head unit to not have distortion but it is possible. When this happens, I back the volume down to 3/4 and adjust gains for distortion from there.

The rear grills, I didn't really care for the looks of them so I went with the CVO grills. They fit perfect but they're not cheap. There are certainly other options out there. I understand folks have bought HAT, Polk DXI series, and other manufacturer grills off eBay to protect the speakers and gain a little better appearance. here's mine.

https://www.dropbox.com/s/gro6je55yy...-36-23_370.jpg

https://www.dropbox.com/s/fue25ldmxn...-03-57_880.jpg

https://www.dropbox.com/s/km5nz4mz46...-04-11_781.jpg

https://www.dropbox.com/s/msyvrrsf1v...7-04-18_48.jpg

https://www.dropbox.com/s/4umb1ysjki...-41-30_318.jpg