Disagree. Before making a distinction between 2 ohm, 4 ohm, and 1 ohm, it is crucial to first understand what exactly is an ohm and how it applies to car stereo receivers. The amp will usually deliver it's rated power to the sub-woofer and you will hear sound. Most of the time it will be on the side of the coil, probably in very fine print. Most car audio speakers rest at a 4ohm load when connected to a single channel on an amplifier. Now for the sensitivity, i.e. Power is the only factor of an amp that has any effect on SPL. 400@4ohms is the same as 400@1ohm." 4 ohm subwoofers will have a higher electrical resistance, use way less energy and will, therefore, last longer than subwoofers with lower resistance. ), and connect that to the 4-Ohm output of the amp. In the simplest of terms, an ohm is the amount of resistance that an object or an instrument offers to the flow of electricity. This is an important difference when using your amp to power multiple subwoofers, because you won't be able to bridge your multichannel, 4-ohm stable amp to power multiple subs that present less than a 4-ohm load. The most logical setup would be 2 dual 4 ohm subs to a 4 ohm load. yes 6 or 7 wraps using 30ga with a 5/64 id should get you right at 1.5 ohm with little to no lag while still being durable enough to hold it's shape and re-wick with micro coils. "if you put the exact same watts at 1 ohm and then at 4 ohms, yeah the 1 ohm will be waay louder, cause of less impedence." the quality of sound it produces, let us say the 2 ohm subwoofer will be at 86.4 dB at 1 watt and for your 4 ohm, 86.6 dB with the same wattage. I personally use 28ga for lower 1 ohm builds and use 30ga for mid 1 ohm up to 2 or slightly over. The lowest standard impedance is 4 Of course, if you had 2 of them, you could connect them in series, (watch the polarity! See if you can get or borrow an Ohm meter, and check the D.C. resistance of the voice coil. What do those numbers mean for you the vapor? I believe most, if not all of those amps will do the same power from 1-4 ohms (JL being 1.5-4 ohms), Now I'm not sure if these amps are a bad example (they may not have such effects, but I'm not 100%), yes they will do the same power, lets say 1000 watts @ 1 ohm, 2 ohm and 4 ohm. Instead, use a mono amplifier to power a 2-ohm load — two 4-ohm subwoofers, or 2, 2-ohm dual voice coil subwoofers, for example. Now at .2 dB difference, this actually is a very slight difference. For example, our XTHUNDER1200.1 amplifier is rated for 1200 watts RMS @ 1 ohm. They also produce less sound in comparison to the 2 ohm ones. "A watt is a watt. Some of the more common ohms are 1.5, 1.6, 1.8, 2.1, 2.2, and 2.5 ohms. 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