Some amps like subwoofer amps can handle loads down to 1 ohm most of the time. Some are only rated down to 2 ohms. They usually are called mono amps because they have one speaker output that only sends one signal through one speaker output. Then there are the 4 channel and 2 channel amps that have multiple speaker outputs and they can play stereo which sends different signals through each channel so it adds a sense depth that is needed for your mids and highs. Most of the 4 channels and the 2 channel amps can only play down to 4 ohms. Some down to 2 ohms. So amps put out there rated power at different ohms for what there designed for.
Theres two ways you can wire your speakers to the ohm that the amps put out the power you want.
One way is wiring them in parallel. If all the speakers have the same impedance, the total impedance is the impedance of a single speaker divided by the total number of speakers. If you have two svc 4 ohm speakers connected in parallel, the total impedance is 4/2 or 2 ohms. If you have 2 dvc 4 ohm subs connected in parallel the final load is going to be 1 ohms.
The other way is to wire them in a series. In a series connection, you simply add the individual impedances. If there were three 4 ohm speakers in series, the total impedance will be 12 ohms.
In some instances you need a speaker with a higher impedance so you can wire it to the ohm load that meets the RMS of the speaker.
heres a basic calculator for finding your desired load. Just click on how many subwoofers or speaker you have and then the impedance of each speaker.
www.rockfordfosgate.com/r...wizard.aspheres a more detailed explanation of different ohm loads and ways to wire your speakers.
www.bcae1.com/Kinda of hard to explain in a single post but i tried. If i didn't answer your questions just explain what you want to learn in more detail.
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