Power wire spliting question

[superakuma 10+ year member]

My current system

JBL P180.2 amp 90wRMS x2 @4ohm

Directed 1100D 1100wRMS x1 @1ohm

4 gauge from power line split in a fused distro block and split into TWO 8 gauge wire and into each amp.

I know the 4gauge main like should be able to handle the 1280wRMS or so that I am running right now and I know that the 8 gauge should be fine for the jbp 180wRMS amp. But Im iffy on the 8 gauge that Im using for the 1100wRMS amp even at only 2 ft long. And I got that 8 gauge wire from a cheap place so Im not sure if it really is TRUE 8 gauge. So I want to upgrade that line to a 4 gauge to that amp since they dont make/cant find anything else in between.

The problem is that the Fused Distro block that I have is the one from knukonceptz and it does 4 gauge input and two 8 gauge output. I want to a get one that is 1/0 gauge input and atleast two 4 gauge output because when I plan to get a bigger system I just need to buy a 1/0 gauge main power line.

Something like this

http://www.cardomain.com/item/LITPD204

My question is can I saftly go from a 4 gauge main line and split it into ONE 8 guage(jbl) and ONE 4 gauge(directed amp)? Or would I need to upgrade the main line to an 1/0 gauge to do this saftly.

BTW, where else can I buy amp install stuff(wires, fused distro block, fuse, RCA wires...) for a good price besided sd.com and knukonceptz.com or ebay?

Mainly looking for a good cheap FUSED distro block that has one 1/0 gauge input and two 4 gauge output.

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[Lakota 5,000+ posts]

1/0 for sure would be the best, but it should be fine to split the wire 4awg for the sub amp and 8awg for the little amp. My power wire is 1/0 and I have it split into very short strands of 4 awg at the amp.

 

[turnstylez18 10+ year member]

ur fine...thats what im doing with my car...4gauge for my 600rms amp...and 8 gauge for the smaller one