ok whats the advantages of 2 over 4... an can i make my 4ohm speaks into 2ohm by adding a resistor, and where.... also is it possible to bridge an amp twice?? 4chan into 1chan...
2 ohms will give more power than 4 on any given amp. Assuming the amp can handle it (some can't). A few amps are rated the same either way, so you gotta look at the specs to be sure. Other than that it doesn't matter.
You can change 4 ohms to 2 ohms with a resistor... but resistors make heat, not sound. No point in it except to waste power.