Are these diagrams correct?

[TheJuggla1 10+ year member]

I have 2 15" Kicker squares(2 Ohm DVC) on a mono 1000 Alpine, a little bit underpowered. I was thinking about buying another amp to go with them then I checked out the wiring diagrams this is how it is now:

http://akamaipix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/2DVC_2-ohm_mono.jpg

So I was going to run 1 off the mono amp I have and buy another mono, but I noticed in this diagram

http://akamaipix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/1DVC_2-ohm_mono.jpg

Its a 4 Ohm load, and my 1000 Watt Alpine only gets 600Watts off 4 Ohm, so thats barley an upgrade? But my main question is, for knowledge, why is it there is more resistance with 1 sub then there is when I have 2? Or are these diagrams incorrect?

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[Johnny Law.Lulz 5,000+ posts]

you can wire either way.

 

[csu87 10+ year member]

you can get a 1ohm load per sub if you wire all positive terminals together and all negatives together

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=1&woofer_imp=3

 

[Johnny Law.Lulz 5,000+ posts]

im stupid

HEre

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp?submitted=true&woofer_qty=2&woofer_imp=3

i shouldve looked at your links first but you can only wire to .5 or 2

 

[TheJuggla1 10+ year member]

This is my amp: http://www2.visions.ca/catalogue/category/Details.aspx?categoryId=54&productId=3201&menuId=1&parentId1=49&parentId2=''&parentId3=''&menuLevel=2

I don't think .5 or 1 is safe with it is it?

Also does the Ohms matter for sound quality? If so, what is best?