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Addition to speaker system help
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<blockquote data-quote="HardofWhoring" data-source="post: 8857426" data-attributes="member: 674149"><p>Watch the video. It's how you set your gains so you know what wattage they are going to be putting out. You don't set em to RMS, you set em to what you want/ to what the speakers RMS is, (or a little more). </p><p></p><p>Do the math. Go backwards from the video, (on each amp):</p><p>AC voltage squared / by ohm rating = (actual) wattage per channel. </p><p>wattage per channel x number of channels = total amp output wattage.</p><p>total amp output wattage / amp efficiency = amplifier draw in watts.</p><p>amplifier draw in watts / voltage = amplifier draw in amps (for each amp. Do all, and add together).</p><p></p><p>Your amplifier draw in amps is rated in hours, and so is your battery. </p><p>total battery storage in amps/reserve capacity / total amplifier draw in amps = how long your system will play, (on full power with full draw). If it's 160 amp draw, and two of those 135 amp batteries. </p><p>You can even take any decimal for hours and / by .6 = minutes for your batteries. </p><p>270 / 160 = 1.6875. .6875 x .6 = 41 minutes. (1 hr 41 minutes from full to empty).</p><p></p><p></p><p>Two will work, but will it work, LONG ENOUGH..... FOR YOU. </p><p></p><p>An alternator is going to recharge. A battery is going to store. That's on how you use it, (with the engine off, at idle, or running? Boating isn't as universal an answer as it is in a vehicle).</p></blockquote><p></p>
[QUOTE="HardofWhoring, post: 8857426, member: 674149"] Watch the video. It's how you set your gains so you know what wattage they are going to be putting out. You don't set em to RMS, you set em to what you want/ to what the speakers RMS is, (or a little more). Do the math. Go backwards from the video, (on each amp): AC voltage squared / by ohm rating = (actual) wattage per channel. wattage per channel x number of channels = total amp output wattage. total amp output wattage / amp efficiency = amplifier draw in watts. amplifier draw in watts / voltage = amplifier draw in amps (for each amp. Do all, and add together). Your amplifier draw in amps is rated in hours, and so is your battery. total battery storage in amps/reserve capacity / total amplifier draw in amps = how long your system will play, (on full power with full draw). If it's 160 amp draw, and two of those 135 amp batteries. You can even take any decimal for hours and / by .6 = minutes for your batteries. 270 / 160 = 1.6875. .6875 x .6 = 41 minutes. (1 hr 41 minutes from full to empty). Two will work, but will it work, LONG ENOUGH..... FOR YOU. An alternator is going to recharge. A battery is going to store. That's on how you use it, (with the engine off, at idle, or running? Boating isn't as universal an answer as it is in a vehicle). [/QUOTE]
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