Sub-woofer fast enough for Horns?

Bob_ +1 I must have at least eight subwoofers in cars, Bass amplification, computers, two channel, and HT. And I don't have a clue as to what is meant by slow sub?

I compared a REL Studio III with a JL Audio F113 and my DD-18 Velodyne in my two channel setup. To get the REL to integrate on its own it was a matter of lowering its gain to an unacceptable level. By comparison this sub with its high level connection method was a total joke but I can't say it was slow.

Using a line level connection from the Velodyne EQ to the REL helped a great deal. It also freed up the ability to find a better acoustical location. Connected to the REL my main speakers lost a bit of everything. But hey, they have a huge following.

I guess out of phase could give the sensation of slowness but most powered subs have a phase switch.

There can be a noticeable difference in presentation between small and large driver subs. Is that slowness?

One of the most knowledgable sub designers is Tom Danley who developed the phenomenal servo belt driven driver motor. If anybody can speak to the original posters question I'd suggest him.

http://www.danleysoundlabs.com/

Some interesting responses that go right over my head. I honestly can't say if this has any effect on the time aspect of a subs delivery. In the seventies Techniqs (Panasonic) marketed a line of speakers with staggered driver units keeping the driver motors inline with each other. B&W followed with their 800 series.

Going from a single 18" to two 12" subs I changed sub location to the outside of the main speakers and slightly forward of the mains baffle. While the Velodyne EQ plot looked like a smoother starting point I honestly can't speak to any sonic advantage. Looks good though.