Some of the more common ohms are 1.5, 1.6, 1.8, 2.1, 2.2, and 2.5 ohms. Power is the only factor of an amp that has any effect on SPL. Most car audio speakers rest at a 4ohm load when connected to a single channel on an amplifier. 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. But since the 4 ohm subs can be wired differently resulting in an effective total impedance of 1 ohm, you get the full 1000 watt power from your amp and match the rated power of your subs for full performance. ), and connect that to the 4-Ohm output of the amp. I personally use 28ga for lower 1 ohm builds and use 30ga for mid 1 ohm up to 2 or slightly over. What do those numbers mean for you the vapor? The amp will usually deliver it's rated power to the sub-woofer and you will hear sound. 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. 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. For example; a subwoofer connected to an amp is an electrical circuit and can be measured in ohms. 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. 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 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. Where do you find the ohm of your coil? "A watt is a watt. Now at .2 dB difference, this actually is a very slight difference. See if you can get or borrow an Ohm meter, and check the D.C. resistance of the voice coil. Disagree. yes Most of the time it will be on the side of the coil, probably in very fine print. "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." 400@4ohms is the same as 400@1ohm." They also produce less sound in comparison to the 2 ohm ones. The lowest standard impedance is 4 Of course, if you had 2 of them, you could connect them in series, (watch the polarity! A bloodied Kawhi Leonard was forced from the Clippers' game at the Nuggets in the fourth quarter after a collision with a teammate left him needing eight stitches to treat a mouth laceration. The most logical setup would be 2 dual 4 ohm subs to a 4 ohm load. For example, our XTHUNDER1200.1 amplifier is rated for 1200 watts RMS @ 1 ohm. Now for the sensitivity, i.e. In the simplest of terms, an ohm is the amount of resistance that an object or an instrument offers to the flow of electricity. 4 ohm subwoofers will have a higher electrical resistance, use way less energy and will, therefore, last longer than subwoofers with lower resistance. Rated for 1200 watts RMS @ 1 ohm up to 2 or slightly over 2.1 2.2. 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