On a sub is it better to have more OHM's or less?

Question

I am buying some subs for my truck and I am wondering if I should get subs that have 2, 4, and 8 OHM's. What is an OHM and what sounds the best. Any info on this mystirous OHM would be great.

Answer 1

One is NOT better than the other! the 'ohm' is just a measure of resistance. It tells you how much of a load you are putting on the amp. The lower the number, the less the resistance= more current flow,.... if your amp can handle that much current flow. It may be best to look at the subs in this manner; Which is better, a "D" cell battery or a "C" cell battery? Neither is better, one just fits your application better.

Most amps can operate easily at a 2 ohm load, so to get the most out of your amp, you want to keep it at 2 ohms to get the most power. If you are going to only have one sub on a mono amp, get the 2 ohm sub. If you are going to run 2 subs on a mono amp, get 4 ohms. In this case, 4 ohm + 4 ohm = 2 ohm. If you are running a 2 channel amp "bridged" to mono get one 4 ohm sub or two 2 ohms subs series. There are many different scanerios, but you should do some research on what is best going to fit your application

Answer 2

first thing you want to do is find a amplifier and base your subwoofers around the amp. The amp will have its lowest impedance (ohm) shown in the specifications, and will show the wattage it puts out at that ohm level. It should have either its RMS, continous power, or it will show its maximum power wattage.

For Ex : 1 x 400watt RMS @ 2ohms
1 = the channel , 400 watt = (RMS) continous power from amp, @ 2ohms = amp ohm level

the channels will go with the number of subwoofers you have for your system. basically

No ohm level is really better than another just as long as its subs ohm and amp ohm is matched up and you will be satisfied.
now find the subs that match the amps ohm level and make sure it gives the subwoofer its right amount of wattage. Subs will have its RMS and MAXIMUM watt shown as well. there is basic information to get started Good Luck.

Answer 3

Different impedances (ohms) is just for different wiring methods. Yes loading an amp at lower ohms does push more power out of the amp, but at a price. You get an increase in THD. Of course if you don't care how it sounds, load it up.

It's always best to find the watts you want to drive at a 4 ohm load versus a 2 ohms load. The amp will run cooler, sound better and last longer. It will be more expensive, so either way there is a price.

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Answer 4

It really depends on the amp you get more then the subs... Do you have the amp? Let me give you a price on all this stuff and see how it compares I am an authorized dealer. I carry over 50 brands of equipment. So what did you have in mind and what is your budget and goals with you system? Let me know.

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