is there really a need for two subs?

Actually two subs are much harder to blend than one sub. Phase relationships are the key when using stereo speakers.

I don't agree stereo subs are harder to blend. They are each playing separate stereo channels. No different than two speakers (just the lows). If you have problems with stereo subs, you will have the same problem with the bass response of your two main speakers. It is not the subs.

Now using double subs (two subs playing the same signal) might pose a blend problem.

Hi
One good sub is better than two bad ones.

But all bass in recordings is stereo.
I use two 24 inch 500 lb subs and they are great. A pair of ashley MOSFET amps that run over 1,000 watts RMS each and level 25 tri-phazers.

mike

Wave launch, and phase intergration of stereo subs is a major part of the blending process. This is mostly a time consuming problem. The process can take much longer when your main speakers have 2 woofers in each cabinet. These woofers, one loading near the floor and the other loading near the ceiling do effect the arrival time of the first bass wave. Placement becomes even more critical when your room is of irregular shape. Bass loading in odd shaped rooms can be an ordeal. With much time and care the payoff of two 15in. servo subs loading with their four 10in. brothers makes for a grand and accurate sounstage.

I've had a single Titan II LE for over a year and absolutely love it. It is seamless. I've wanted to try a second unit but didn't have the extra funds. A couple of monhts ago a friend got one of ACI's new Force subs. We spent a couple of weeks playing around with it and concluded that it sounded a LOT like the big brother. So I started experimenting with stereo subs. At first the results were not an improvement. However, after changing room placement and tweeking the settings, well let's just say I now know that I'll be getting a second Titan II when I can afford it. We've found improvements in soundstaging and bass detail. I will add that I would definitely rather have one "great" sub than two "good" subs.