A receiver is a device in car and home audio that contains a pre-amplifier, amplifier, (usually) a tuner, and (sometimes) equalisation settings.
A 2-ohm receiver is one that can comfortably supply power to a 2-ohm load (i.e. the speaker). A 2-ohm speaker is relatively non-resistant load, meaning that it will take a lot of CURRENT necessary to FLY through it to operate it satisfactorily.
If you tried to power a 2-ohm load with an 8-ohm receiver, for instance, the 8-ohm receiver would be pushing tons of current through the speaker, but the speaker would not physically be moving very much (perceived as low volume), because not enough work is being done in the voice coil. If you attempted to raise the volume up to listening level, you run the risk of overtaxing the power supply, and thus destroying it.
In your situation, however, only seldom are there speaker products rated lower than 2-ohms, so you probably shouldn't have to worry about that. I've seen large subwoofers rated at 1/2 ohm, or 1 ohm, but these are a speciality item, and you'd probably know if you had one.
If your home receiver is not rated for a 2-ohm load (many can handle a 4-ohm, but not a 2-ohm), you will damage components inside the amplifier by over-current. Don't use car stereo components in home stereo equipment. It's like using a hockey helmet to ride a motorcycle.
take a 2 ohm bridge into 1 ohm
2 in series with 3&4 in parallel
The equivalent resistance of the parallel combination is 2/3 ohm.
Four 8 ohm speakers wired in parallel would give an effective 2 ohm load.
The difference between 2 ohms and 4 ohms is 2 ohms.
10 Ohms.
is it duel 2 ohm or duel 4 ohm or just a singel 2 ohm sub??? you can run anything from a 1 ohm amp to a 2 ohm amp just depending if you want to add another sub later if your wanting to add 1 later get 1 big enough to run 2 subs so you wount be wasting your money on sumthing you dont need say 5 months from now
If you are trying to pump a 2.4 ohm sub with a 2 ohm rated amplifier you should be fine. The rating on the amplifier is the least resistance it should have on its load. Anything less than 2 ohms would fry your amp.
Yes, you can have a 2 ohm subwoofer and a 4 ohm subwoofer in the same system. However, it is important to match the impedance to avoid damaging your amplifier. You can wire them in series or parallel to achieve a compatible overall impedance for your amplifier.
Parallel
That would yeild a 4 ohm load