Two subs or one - Page 2

Sometimes, but the 650 dollar sub (Outlaw EX) I got for 550 shipped is specced to -2dB at 16 Hz.

I still want a second one, but that's far more about even response, which is an issue with any single subwoofer.

Which for me I totally agree with.

Possibly, but not necessarily. In general the difference between a $200 driver and a $400 driver is power handling and excursion, not how low it can go. Where you'll find LF extension lacking is in the $400 and under range, where the cab will be loaded with a driver that retails for $100 or less.

That's the only downside I can think of to 'lesser' multiples. They can take you louder but not lower.

Read the post above yours again. Price and low frequency extension are not directly related.

It's not so much about loudness either, its about better room coverage and flatter frequency response. Two subs located at opposite ends of the room only gets you a 3 dB increase but better room coverage. To human perception, 3 dB isn't a big increase in loudness.

You still get the same 6dB on average that you do if the subs are placed together. What differs is that when close coupled there's no alteration to in-room response. When separated you don't get an even 6dB across the board, it varies with frequency, based on the room modes. But that results in smoother in-room response, which is the point of multiple subs.

Remember beside the driver size difference, they are not the same type of driver.