Quote (Subwoofer @ Jan 4 2012 11:10pm)
he said his current battery cca was only 500 max so how is a 750 cca yellow top going to be worse?
there are plenty of 6 1/2 subs on the market. subs are about low frequency response not size.
red tops are cranking models. yellow tops are dual purpose models.
deep cycle dry cell fits his needs perfectly. he doesn't need more cca than a mid range yellow top. it will last a lot longer than a wet cell and end up costing much much less.
"adding more amps" is a bad way to give advice. he should focus on rms watts total in order to properly upgrade his electrical system to the correct specifications.
I was simply informing him of the distinction between a deep cycle and a regular battery...and that deep cycle batteries of a given size have less CCA than a regular battery. Like I said, he would be fine going with a deep cycle battery as you suggested, but there is also no harm in selecting a regular battery with more CCA given the climate he lives in.
Also, size of a driver is almost always a direct reflective property of their propensity to be able to reproduce a low frequency. Drivers are limited by the laws of physics in their ability to reproduce low frequencies...larger drivers are simply more able to reproduce lower frequencies. Most people would agree that a 6.5 driver is a mid bass driver, not a subwoofer and that ture subwoofers start at 8 inches.
Furthermore, he should focus on continuous watts total, not necessarily rms total simply because of the misrepresentation of rms (which by definition does not mean continuous power) power by most audio companies. True audio companies will advertise their components continuous power, not rms power.
@OP: I apologize if I'm starting a debate. I'm simply trying to explain a few things in greater detail so you can understand why we are recommending certain things.