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<blockquote data-quote="Kyle_Keating" data-source="post: 3940951" data-attributes="member: 582385">You are putting a driver with a Qts of ~0.15 into a sealed box! I don&#039;t even have to model this out to tell you you&#039;re probably down 20 to 30dB by the time you hit 30Hz... You have no bass. The only way to correct this is to use a massive amount of EQ and power, we&#039;re talking 20dB boosts in the low and that is what you need to do who attempt to seal a 4HP like driver. No normal car audio amp is going to hold a candle to that kind of EQ, you need other equipment. Otherwise put that driver into a 4th order box and you&#039;ll get everything back in the low end and some. It will likely be peaky down there in a ported box. The 4HP&#039;s don&#039;t need large ported boxes, in fact there is no other driver that can work in a smaller ported one in existence, so space should still not be a problem... making the port large enough to prevent compression... very difficult and i can provide some suggests for that, but you should look into a 4th order system.now, as far as wiring, I&#039;m not sure i understand what your doing, but here is most common way to wire a quad, the 5200 was something like 1.2 or 1.4 ohm vc. so this will give you a final load of exactly that number.<img src="http://www.tcsounds.com/images/QSPW.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

[QUOTE="Kyle_Keating, post: 3940951, member: 582385"] You are putting a driver with a Qts of ~0.15 into a sealed box! I don't even have to model this out to tell you you're probably down 20 to 30dB by the time you hit 30Hz... You have no bass. The only way to correct this is to use a massive amount of EQ and power, we're talking 20dB boosts in the low and that is what you need to do who attempt to seal a 4HP like driver. No normal car audio amp is going to hold a candle to that kind of EQ, you need other equipment. Otherwise put that driver into a 4th order box and you'll get everything back in the low end and some. It will likely be peaky down there in a ported box. The 4HP's don't need large ported boxes, in fact there is no other driver that can work in a smaller ported one in existence, so space should still not be a problem... making the port large enough to prevent compression... very difficult and i can provide some suggests for that, but you should look into a 4th order system. now, as far as wiring, I'm not sure i understand what your doing, but here is most common way to wire a quad, the 5200 was something like 1.2 or 1.4 ohm vc. so this will give you a final load of exactly that number. [IMG]http://www.tcsounds.com/images/QSPW.jpg[/IMG] [/QUOTE]

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