4 ohm speakers

When paralleling a 4 * 6 with a 4 for the front soundstage, you will have to limit the amount of bass you send to them to only what the 4's themselves can handle.  You won't have the advantage of the wider range that the 4 * 6's should be able to cover.  The crossover to sub will have to be somewhat higher than it could be if only the larger woofers were used up front.  So although you are adding a couple decibels by making the amplifier work the fronts at 2 ohms, the higher (mid)bass -to - sub bass crossover may leave it sounding like you got less...not more.

As far as the connectivity question, as DYohn said it is either way.  A parallel connection is polarity connected with like polarity at any point in it's electrical path - at the amplifier terminals, sharing a speaker's terminals, or at any point along the wiring.  Be sure that any such connection you make is a proper electrical connection (such as twisting / soldering).

OK I thank both of you guys for your help on the subject. Well I have another question. Last night on my way home from work I noticed a faint noise ( which sounded like static ). Well I also have a set of 6x9's on channel 3 and 4 of that 4 channel amp. My dad and I think we have narrowed it down to the 6x9's making this noise. Well my dad and I install all of our own equipment because we enjoy seeing the finished product. But everything is looked at by our local shop. So I dont know what this sound is but I it wasn't there when we first put the 4 channel in which was about 2 weeks ago. Once again any help with this would be much appreciated.  And the 4's and the 4x6's are just to just play the high's and the 6x9's are set to just play full range all the settings on the amp.

Ok thanks again and well see I mean I will def check the ground but see my sub amp and my cap ground is at the same place and I dont hear any noise coming from the sub. And my dad and I cant seem to find a good looking grounding block ( any help on that would be great ). But like I said I will def check the grounds and everything in the morning. But is there anything else it could be.

It turned out to be the 6x9s the tweeter was blown.