yes all u have to do is bridge them together
If you amp is bridgeable you run + sub wire to ch 1 + then the -sub wire to the - of ch 2 of the amp. The same with the other sub + ch3 - ch4 that's how to bridge your amp.
3 passive sub at 8 ohm imp in parralel will be 2.6+ impedence.Most of the professional sum amp can take up to 2 ohms load per channel(check the spec of the Amp)eg: you should be able to connect max 4 subs in each channel(match the watts pwr to amp)
To bridge your amp you have to first look at your amp,find the speaker hook ups and it should say either on the top or the bottom [-------------bridge------------------]- + - +- +- +- after you find this you will have to run two sub woofers or one duel voice coil speaker to the positive side and one to the negative side of the bridge on your amp,you will connect the two positives of the two subs together and hook up to the positive side of the bridge and then the two negatives of the subs together to the negative side of the bridge,that will bridge your amp and speakers.Make sure that your amp can handle the new load, if it can't ,then it will start to cycle on and off.If that happens just run in stereo,not bridge mode.(Some amps will have a switch that you have to press to make it run in bridge)
A 2 channel 900w per channel amp or less will run it, or a 1800w one channel amp etc.. Keep in mind the ohms need to match up too
You can connect a sub and speakers to one amp, depending on how many channels your amp has. A 4 channel amp will be able to run one (or two) subs using two channels (one bridged* sub or two subs) and two speakers running one channel each. A 2 channel amp will run 2 speakers or one bridged sub. A 6 channel amp will run one bridged sub (or two subs), 2 front speakers and 2 rear speakers. In my opinion, you will get the most performance, depending on which amps you use, by using a monoblock amp for your sub and an amp with enough channels to run all of your speakers. # Bridged = putting together the power of two channels to run one sub or speaker. Note: not all amps are bridgeable.
Run a 2 sub per amp set-up. Get a distribution block for you power wire to split the power wire. You can run the remote wire from your stereo to one amp and then from the amp to the other amp. you will also need 2 sets of RCA's Easy way is too get a 4 channel amp to power 4 subs.
You won't notice any stereo separation with two subwoofers because our ears perceive bass as omnidirectional. Two subs can make more volume than one of the same size. If you are using two subs, you should either use two separate mono amps, or a two channel setup. As long as the amps have a high pass filter they will work equally well, although the wiring will be simpler for the two Chanel setup.
A 800 watt 2 channel amp will work
Not if subs are rated for 2000 watts each.
This question makes little sense. Could you say what model amp it is? With two 4 ohm subs, you can either do 1 ohm or 4 ohm. Now if you have a bridgeable two channel, I think you can do a 2 ohm load. For a 4 ohm load, two 4 ohm subs, connect both positives from one side of the subs to the positive out. Then the negative coils from the opposite side (other side of the sub) to the negative output. Then connect the remaining negative and positive together on each subs. Look here http://www.the12volt.com/caraudio/woofer_configurations.asp
14 guage will be fine. 13 if you have the money. But if youre only going to run two 400watt subs and NOTHING else then you can use 16 guage You shouldn't run a higher wattage then what the sub's are rated for... You'll blow the subs. If you have two 400w sub's then you either need (at max) two 400w single channel amps or you can get one 2-channel 400w and bridge it but idk if they make 2-channel in that low of an amperage or you can use one 800w 2-channel amp ( don't bridge). If you want to use the 18/00w amp you can use anything over the amperage your putting out .. not under because the wattage on the subs and amps is the max, so for subs you don't want to exceed the max. I have two 2500w boss competition sub's being pushed by a 2000w Pyle power amp and they do great. I plan on adding another identical amp (one for each sub and a 4000w inverter so it doesn't kill my battery and alternator. Anyways to answer this question.. 14g will b good for the 400w sub's (btw)...they don't make 13g ',:l and if you end up using the 1800 I'd go with 12 or 10gauge wire they have rolls of good wire at Walmart or advanced. You can never go to big with wire and the cost for wire doesn't change much of it even does at at all, only with the change in the size of roll (length of wire) . The thicker the gauge the easier it will carry the current and the better your subs will sound.