Subwoofers - crazy upgrade!

I will be playing around with room correction this 

weekend, very interested to see the impact it has. 
I am guessing it will be less boomy but play louder

with a touch more visceral impact.  I do need to check

into the best way to connect it.  

I have 4 subs, placed in the corners of the room. But I wonder if stacking 2 in the front would be better?

Anyone have an opinion on this? They are heavy, so to stack might be difficult for me.

ozzy

@ozzy  I was running two subs in stereo. It wasn't difficult to try the experiment. I took the feet off and used soft, grippy shelf liner and placed one on top of the other as close as possible. I pulled them out of the corner about 12" or so. This was NOT difficult.

The set up I use is... the bottom sub is crossover @ 40hz. The top sub is crossed slightly higher @60hz. Piggy back connection.

Why would this sound better??? Physics. When you 'couple' them properly you get an automatic boost of about 6db. That's alot. Free boost.

Why is this better? My bass is loud enough!! THIS is the important thing to understand. We've all seen the videos of the bass driver pulsing and extreme excursion pumping in and out.. This is the worst thing you could have! The more excursion = more distortion. The 6db boost requires you to turn DOWN the gain setting. This gives LESS excursion and less distortion. The bass becomes tighter, punchy and effortless. It's not working as hard.

Before stacking, my gain settings were around 1:00 on both subs. After stacking they are turned DOWN to around 10:30. Clearer, cleaner bass definition and plenty of punch with LESS excursion. My mid-bass is also improved due to the higher crossover on the upper sub.

THIS has been the best tweak to my system. Super easy and It cost nothing and took me an hour. Highly recommended.

Thanks to REL for bringing this to the forefront.

gdaddy1,

Thanks for that information. My only problem is the weight of the subs (140lbs) and my age. I would like to try it however.

ozzy

@cdtd 

Elevating your subwoofer might decrease your volume/gain because you are moving it away from a boundary which serves to reinforce the output. But as always, try it and see if you like it.