Duran

155 square inches, if you would like your port to function properly with the displacement of the driver and the tuning you would like. Too little port and you've got yourself a leaky sealed box.

To stir the pot, of course.

Reverse the polarity of all drivers being mounted inverted.

If done right, it would work. Remember Hoffman's Iron Law, he has failed to mention tuning, so you don't know what choices he's made. I have an N3 18" in 2.7 cubes Net, I chose small size and low end, so obviously it's inefficient, but I've kept much more trunk space that would have been lost. It's also in a tapered horn, so that helps efficiency and air coupling.

Time for composite cones I see.

That is DCR, not impedance.

Remember, Fs is only the frequency at which the suspension resonates in an anechoic room. That means nothing in a real world application.

The Mayhem is conservatively rated at 2500 watts.

My Nightshade 12's were quite smooth tuned to 35 Hz. in 2 cubes each. I assume the application was at fault as the equipment is very capable.

The XCON isn't quite on the same level as the Mayhem, look at the ZCON instead.

Is a 4th order bandpass possible?

Vehicle acoustics play a much more important role in SPL than anything, once you master the space in your vehicle the sky is the limit. If you wish to venture in the physics behind how ports work, read this:

Me neither. Heck I don't even take otc drugs ever. I don't drink hardly at all. Maybe once or twice a year. X2 on the drugs here. I did take over the counter pills for colds and various other stuff but nothing to drug me up. Can't say the same about alcohol but I've never ever blacked out or wasted. I don't even take medicine for colds. Just let my body fight it out. Of course I've only gotten 1 cold in the last 8 years or so. Which is pretty damn good seeing as I work outside, and the winters it is usually poring rain and in the mid 30's. Being physically cold does not cause a cold, that's an old wifes tale

I make pharmaceuticals, I promise you guys don't want to know what substances are actually in them.

It's a Chinese basket vs. an American basket. No difference really.

Happy birthday, brother.

Not worth it.

I've been throwing around the idea of IB in my Elantra as well.

Port area per cube is a joke (most of the time). You must calculate minimum port area per the driver(s) used and the desired tuning. Internal area doesn't matter either.

Port area per cube is a joke (most of the time). You must calculate minimum port area per the driver(s) used and the desired tuning. Internal area doesn't matter either.

They make hundreds of woofers per week, most of those people send emails wondering where their order is, many people send inquiry emails concerning a future order, or about the company, etc. With as many orders as they receive they need everyone they can making woofers to ship in a timely manner; no one can spend their time answering emails. Products ship when they are complete, a PayPal dispute will only leave a sour taste in everyone's mouth.

AA Mayhem Nomex spiders are standard now.

Loving the upgrades Jules.