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Amplifiers
Higher Effiency vs Lower Ohm Load
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<blockquote data-quote="Blackout67" data-source="post: 8877354" data-attributes="member: 683415"><p>So I have been watching amp dyno videos because I need to replace my amp I've blown and I've noticed that as speaker impedance lowers, effeciency of the amp drops condsiderably and I want to know why 1 ohm stable amplifiers are pushed so heavily and everyone looks for them (hell every time I shop for one myself, I always go straight for 1 ohm stable amps), if you can get an amplifier that puts out the same power with better efficiency?</p><p></p><p>Let me explain:</p><p>My girlfriend needs a new amp cause Im pretty sure I fucked it up by running it over with the chair moving to back and forth so many times. Anyways, I was looking for something small and effient for her single cab beater truck with no upgades other than an AGM (Never got around to doing the big 3 on this one before I let her take it over) so we wont have to worry about voltage drop cause she loves to crank it and I found the JP3</p><p>So I watched the Williston Audio amp dyno to see what kind of amperage it draws to make the power cause I knew itd be putting out more than rated as all the other JP amps do. To make just over 1000 watts it is pulling 140 amps at 13.5 volts @ 1 ohm. An abyssmal 68% effiency. The test before that. 2 ohm, was making like 950 pulling just 83 amps at 13.6 volts that is 88 percent efficiency. That is a MASSIVE difference especially if you are running a stock alt/battery/wiring.</p><p></p><p>I know the quality of the parts def plays a factor in these numbers, but even from watching other amp dynos and comparing what one would make at 1 ohm vs 2 ohm with similar voltage and the difference was still usually around 15 percent between 1 and 2 ohms which is considerable if you are trying to squeeze out power on a budget. Also keep in mind that as the temperature of the amp rises efficiency will go down too and 1 ohm loads will produce much more heat as they are closer to a theoretical short so your amp has to work harder to keep everyting under controll, generating more heating and lowering efficiency and life span of the product.</p><p></p><p>What are the benefits of "getting the most out of your amp" if it comes at such a large expense? Ive always read that you wire it to the 1 ohm impedance cause its more efficient. Wouldnt it be easier to just match up the driver to an apropriate rated 2 ohm amp since it will take less power to get there and will produce less heat doing so? Ive tried researching but I dont understand so there might just be something Im missing and would like to have an open discussion on this.</p></blockquote><p></p>
[QUOTE="Blackout67, post: 8877354, member: 683415"] So I have been watching amp dyno videos because I need to replace my amp I've blown and I've noticed that as speaker impedance lowers, effeciency of the amp drops condsiderably and I want to know why 1 ohm stable amplifiers are pushed so heavily and everyone looks for them (hell every time I shop for one myself, I always go straight for 1 ohm stable amps), if you can get an amplifier that puts out the same power with better efficiency? Let me explain: My girlfriend needs a new amp cause Im pretty sure I fucked it up by running it over with the chair moving to back and forth so many times. Anyways, I was looking for something small and effient for her single cab beater truck with no upgades other than an AGM (Never got around to doing the big 3 on this one before I let her take it over) so we wont have to worry about voltage drop cause she loves to crank it and I found the JP3 So I watched the Williston Audio amp dyno to see what kind of amperage it draws to make the power cause I knew itd be putting out more than rated as all the other JP amps do. To make just over 1000 watts it is pulling 140 amps at 13.5 volts @ 1 ohm. An abyssmal 68% effiency. The test before that. 2 ohm, was making like 950 pulling just 83 amps at 13.6 volts that is 88 percent efficiency. That is a MASSIVE difference especially if you are running a stock alt/battery/wiring. I know the quality of the parts def plays a factor in these numbers, but even from watching other amp dynos and comparing what one would make at 1 ohm vs 2 ohm with similar voltage and the difference was still usually around 15 percent between 1 and 2 ohms which is considerable if you are trying to squeeze out power on a budget. Also keep in mind that as the temperature of the amp rises efficiency will go down too and 1 ohm loads will produce much more heat as they are closer to a theoretical short so your amp has to work harder to keep everyting under controll, generating more heating and lowering efficiency and life span of the product. What are the benefits of "getting the most out of your amp" if it comes at such a large expense? Ive always read that you wire it to the 1 ohm impedance cause its more efficient. Wouldnt it be easier to just match up the driver to an apropriate rated 2 ohm amp since it will take less power to get there and will produce less heat doing so? Ive tried researching but I dont understand so there might just be something Im missing and would like to have an open discussion on this. [/QUOTE]
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Higher Effiency vs Lower Ohm Load
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