I have a four channel rockfor fosgate amp and I need to know hows the best way to connect Infinity Reference 1252w Car Subwoofers

Wire it in a series. One wire from amp positive to one positive speaker terminal. One wire from amp negative to negative speaker terminal. This should leave one positive and one negative termianl on the sub. Use one additonal wire to connect these two, this wire should not be connected to anything else other than the two remaining terminals. This will allow you to have the music up louder with higher amp settings without having to worry about blowing the speaker as easily.

http://www.rockfordfosgate.com/rftech/woofer_wizard.asp
go here put in your specs and you have your answer :]

if they are dual voice coil goes like this

HI PAL BUY MONOBLOCK AMP TO DRIVE UR SUB TRY GET ROCKFORD FOSGATE, KICKER,BMBOSCHMANN,OR INFINITY

This means you have a dual voice coil sub. It is probably a dual 4 ohm voice coil. If you hook up the left channel to one input and the right to the other you can safely push the sub but the amp will be running at a lower efficency. In other words it isn't the best amp for the job because it can't push max power to a dual voice coil speaker but it will work.

yes u can run a splitter with a four channel amp

this is probably due to the box they are in. it seams that your box is tuned to a lower freq then the bass hits that are popping. message me with the box dimensions and the speaker parameters

Hi,

First of all you need to check if your amp can support this type of speaker setup? If you are simply going to wire 2 subs up to the amp (assuming a 2 channel amp) it's pretty simple. Just connect the + & - cables to one channel of the amp & the other ends of the cable to the sub, making sure that they are the correct polarity on both sides (ie speaker & on the amp).
If on the other hand you want to 'daisy chain' the subs onto one channel of the amp (this effectively drops the load down to half that of the speakers (usually 2 Ohm)), then you do as the name suggests. Simple connect one speaker cable to the amps channel 1 + ve output to subs_1 +ve input. Then from sub_1 -ve connector to subs_2 +ve. This leaves you with only 1 more to connect sub_2 -ve back to amp channel 1 -ve.

NOTE: make sure that your amp can support this first! If it can't then it's will auto switch off in most cases but can also damage the amp if there is no fail safe circuit built in.

no thats not it you are lucky you havent burned it up like that. wire each speaker to its own source positive and negative, you loose power when you bridge an amp and use two speakers, its best to hook up without bridging you will get more volume that way.