pretty basic question, if i have a single channel amp, say 300/1 can i hook up a box with 2 10" subs? Or do i need a different amp? I'm guessing i would hook them up in Parellel and that would half the impedance rating on the speakers.

Correct?

 

Find out what ohm rating the subs are rated at? Then you can either wire them in series or parallel. For instance if you have two dual 4 ohm voice coil subs you can wire them in parallel and produce a 1 ohm load. You can also wire them in series/parallel and produce a 4 ohm load. Hope this makes sense,lol.

 

hmm, I htought two 4 ohm in parellel would be the equivalent of a 2 ohm load and two in series would be an 8 ohm load, I must be getting impedance confused with resistance

 

are they dual voice coil or single?

 

yes!

parallel will halve the impedance, and series will double it, assuming that the impedances are the same, and you only have 2. if they are not things get more difficult

Re = R1 + R2 + R3 etc for series arrangements, just add the impedances together

for parallel:
1/Re = 1/R1 + 1/R2 + 1/R3 etc for parallel.

in both cases Re is the impedance you see at the two terminals you would hook up to the amp. if you have different impedances, the equations above will determine the equivalent impedance, however you don't want to do that because the different speakers would be producing different volumes of audio. if you have more than two speakers, the above equations will also solve it. the double or halve technique doesn't work if you have 3 drivers for example.

you also can wire some in series and some in parallel. I have 2 DVC drivers in my weekend car, I have the two coils on each driver wired in series with each other, than the two drivers themselves are parallel to each other.

the lower the impedance the more volume you will get, because the lower resistance on the output from the amp the more wattage it can produce. determine what the Z, Impedance, of your speakers are, and what the lowest stable impedance of your amp is, then wire them up to get as close, but above, that minimum stable impedance that you can.

 

Here's a great link for you. Will give you any answer you have.

http://www.crutchfield.com/learningc...rs_wiring.html

 

I'm just learning Audio. Good stuff.

 

Right, you are referring to two subs with single voice coils @ 4 ohm as I was referring to two subs with each having dual 4 ohm voice coils.