measure ohms?

1.) Where is the correct place to measure ohms with a meter? Or no matter where you measure it should all equal the same i.e. any V/C or wired connection on the amp?

2.) When an amp is bridged the amp sees this as the ohm load being cut in half. For example say your speaker/speakers are wired to be 4 ohms in series or parallel. Now when you bridge it is this considered to be running 2 ohms or it's still considered 4 ohms but the amp sees a two ohm load?

I think thats all for now and thanks again. I cant seem to figure these out in the reading I have been doing.

With question 1, there are others that would better answer. I believe that because it is impedence and not resistance, an ohm meter cannot measure correctly on a speaker.

Question 2: The amp will see the total load of the speakers that are connected. If the speakers are connected in a way that presents a 4 ohm load, that is what the amp will see regardless of bridging. Bridging is not a function of the speakers, but the mechanics of combining both channels of a stereo amplifier to create one single channel. Basically taking the positive of one channel and the negative of the other to create one output. Most amps can only handle a load of 4 ohms when bridged.

Flakman is correct that you cannot easily measure the impedance presented to the amplifier, just the DC resistance.  To understand why, you must know what impedance, and from that nominal impedance is.  Impedance is the total resistance produced from resistance, inductance, and capacitance in an AC circuit and changes with frequency.  Nominal impedance is a rating that suggests the lowest point this impedance will go, and is usually rounded off.  Here's a link to an impedance curve for an Adire Audio Extremis 6.8: http://www.adireaudio.com/Home/Images/ExtremisZ.gif  As you can see, the impedance changes quite a bit with frequency, with a large peak at the resonant frequency of the driver (fs).  Now since DC resistance is a part of the impedance, it will always be lower than the nominal impedance of the driver.  So measuring it can get you an idea of what the actual nominal impedance is.  So if you measure .8 ohms, then most likely the nominal impedance will be around 1 ohm.  A 3.2 ohm measurement will probably be a 3 ohm load.

No. If you have 1 sub @ 8 ohms, that is what the amp sees regardless of bridging or not bridging. Bridging has nothing to do with the impedence of the speaker.

If you already have subwoofers, let us know what you have and how many. We can then offer ways to hook them up and the amp to drive them.