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<blockquote data-quote="Jeffdachef" data-source="post: 8446923" data-attributes="member: 650438"><p>The FU is at average pricing ATM, not really on sale. I love FU audio for its price bracket but I'm not gonna say that its louder than an hdc3 when its obviously not. The hdc3 is an overall much better sub actually they are in two different leagues to be honest cant really compare the two at all, the hdc3 is in every way a superior sub hence the price difference. The real parameters to look at are the T/S parameters.</p><p></p><p>Motor strength is a lot more with the hdc3 along with stiffer stronger supension and stronger basket with direct leads. If you can spend a bit more, its worth it, you can put a lot of power on the HDC3 comfortably. With these competition brands, as you go up the price escelon, the quality and results usually follows suit.</p><p></p><p>It doesn't matter what solid optima you have, there's a certain amount of battery bank you'll need to handle the current draw your amp has. How much you'll need to upgrade will depend on your voltages. If you get everything in, tuned properly, Take a Digital multi-meter and place it on the amp positive and negative terminals and set to check battery voltage. Play your hardest hitting song and see if you drop below 12.6 volts or not. If it drops below that, you'll need to upgrade. If it doesnt, then you are fine, more upgrades wouldnt hurt but its not necessary. Power that can be ran on stock alternator varies from car to car.</p></blockquote><p></p>
[QUOTE="Jeffdachef, post: 8446923, member: 650438"] The FU is at average pricing ATM, not really on sale. I love FU audio for its price bracket but I'm not gonna say that its louder than an hdc3 when its obviously not. The hdc3 is an overall much better sub actually they are in two different leagues to be honest cant really compare the two at all, the hdc3 is in every way a superior sub hence the price difference. The real parameters to look at are the T/S parameters. Motor strength is a lot more with the hdc3 along with stiffer stronger supension and stronger basket with direct leads. If you can spend a bit more, its worth it, you can put a lot of power on the HDC3 comfortably. With these competition brands, as you go up the price escelon, the quality and results usually follows suit. It doesn't matter what solid optima you have, there's a certain amount of battery bank you'll need to handle the current draw your amp has. How much you'll need to upgrade will depend on your voltages. If you get everything in, tuned properly, Take a Digital multi-meter and place it on the amp positive and negative terminals and set to check battery voltage. Play your hardest hitting song and see if you drop below 12.6 volts or not. If it drops below that, you'll need to upgrade. If it doesnt, then you are fine, more upgrades wouldnt hurt but its not necessary. Power that can be ran on stock alternator varies from car to car. [/QUOTE]
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