How long do Subwoofers and speakers last? Well really I could not tell you that it just depends on how bad or good you treak them. If you overpower them or even underpower sometimes you hurt it. But they give you a peak power typically if you try to stay within a couple hundred watts of that you would probably have a pretty decent speaker for a while. Then they also give a RMS(repeated maximum sound) That they give at the least you should power so if you buy an amp that is like at that power you might be fine but I would try to get an amp that has alot of power.