Pyramid SE301-VL amp wiring confusion...

Not to disappoint you too much, but the 1000 watts advertised is just marketing hype. If your amp is the PB781X, it should have only a single 15A fuse on it. Your battery provides 12.5 volts when the engine is off, so at most, your amp draws 187.5 watts of power. Draws, not outputs. No amp is 100% efficient due to heat. When your engine is running, assuming your alternator outputs 14.4 volts, your amp's maximum power draw is about 216 watts. Again, this is what your amp draws, not what it puts out. What you should focus on is the RMS (continuous) output, not Max or PMPO. Those numbers are useless, unfortunately.
Your amp is rated to output 50 watts per channel at 4 Ohms, and 75 watts per channel at 2 ohms. This is when wiring your channels separately, not bridged. I did not see true power specs for your amp while bridged, but it's possible you'll just get the full 150 watts to the single bridged output. Do not attempt to apply a 1 ohm load to your amplifier, as you will run the risk of damaging it. It's not designed to handle a 1 ohm load. If you're lucky, you'll blow a fuse before the amp is damaged, but either way, there is nothing to be gained by attempting it.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/reginald_bec291de192ca44f

chissis ground is just simply the car body metal, not metal that moves like car seat. drill a hole smaller than your screw and the drive the screw into it with a lug connected to your wiring

Recommend contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

how much rms is the pyramid pb3818 5000w amp ?

Did you say "huck" up the wires?
Recommend contacting a local car audio professional or Pyramid customer support directly here:

http://www.pyramidcaraudio.com/ContactUs.aspx

This is hard to explain and what needs to be done is wire in parallel both subwoofers. This website will help just put in the amount of speakers and amount of ohms each and it gives you diagram.
http://www.the12volt.com/caraudio/woofer_configurations.asp?Q=2&I=81#results

There is no reason even if the wire was to small it would still allow ssound.make sure you have good connections.

one channel in your amp is blown

Depends on the wattage of the amp, if the amp is 150 watts then yes use a 150 watt amp kit, but i'd go with a 30 amp fuse. Basically just buy an amp kit rated at the wattage of the amp, my preferred brand is street wire, but if you're on a budget buy Scosche. Good Luck, if you have any more questions please ask...

White - left front
Grey - right front
Green - left rear
Purple - right rear
Yellow - memory power
Blue - remote power (power ant, amp or eq power)