I lurk this forum sometimes, but from what I've seen the people here have some pretty good knowledge, so I will really appreciate your help here. I currently have a JL 250/1 amp powering a JL 12w3v2d4 sub in a sealed box. Yesterday I purchased one set of Polk Momo MM6 components and a Polk C400.4 amp. The amp will be running at 75x4 (maybe bridged to 150x2) at 4 ohms for now (factory monsoon amp will power the rears). So this gives a potential total of 550 watts RMS. Right now, I only have 8 gauge power running to the monoblock, with I believe a 20amp fuse. I have a few questions. One: Can I run 4 gauge to a distribution block and then run 8-gauge to both amps without a problem? If not, would you recommend just adding a 4 gauge to the new amp and leaving the 8 gauge to the monoblock? Or, should I go 0/1/2 gauge and distribute it to 4 gauge to both amps? Two: What amperage fuse do I need? I think I need 80 amps. Three: I don't want to pay for monster cable. What is a decent manufacturer for cheap prices? Scosche, Rockford? Four: The MM6 supposedly won't fit into my car (MKIV GTi w/Monsoon). Is this true? If so, can I just fabricate a bracket out of wood myself? Thank you so much for your help and for reading my long post.