Originally Posted by sk5987
I'm looking for ways to make my chest quake and shake more during movies with great LFE tracks. But at the moment I'd rather not spend any money. So I'm looking for ways to tweak my system:
Fronts: JBL L5
Rears: JBL L1
Center: JBL LC2
Front Sub: SVS SB-1000
Rear sub: MartinLogan Dynamo 300 (The rear sub is next to my couch and is there to help fill out the mid bass from the rear speakers. I checked with SVS and made sure my setup and settings were optimal given that I have two different subwoofers.)
Receiver: Denon X2300W
Does anyone have any ideas? I was thinking that switching the front and rear subs so the more powerful bass is next to my seat.
You have already gotten good advice in both directions.
This is one of those times that you will just have to experiment to discover what works best for your specific goals. Here are some things to consider.
First, the reason that weaker subs are typically placed nearer a listening position is to make it easier to equalize the SPL with a more powerful sub. That way, you can push both subs a little harder without having the weaker sub make bad sounds from being pushed beyond its capabilities. If you are using automated room EQ, such as Audyssey, you will also get more benefit from that room EQ if your weaker subwoofer doesn't roll-off too much sooner than your stronger sub does. Audyssey will stop EQing when the combined response of your subs rolls-off by 3db.
Putting a stronger sub closer to your listening position, and a weaker one further away, though, might help the stronger sub to be even more noticeable, so it's certainly something that you can try. Perhaps you could even move both subs closer to your couch, and put one directly behind your listening position. Aside from the issues listed in the first paragraph, putting the stronger sub closer to your listening position may make it easier for you to localize where the bass is coming from, instead of having it come from everywhere. That may or may not be a problem for you, which is why some experimentation may help you to decide what you like better.
The second issue involves how you are implementing your crossovers. If you are using at least 80Hz crossovers, and boosting your subs, that should help with mid-bass tactile sensations--chest punch. You can try raising the crossovers a little higher to see if you get any benefit from that, but as you do, localization may become more of a problem. So, it's a balancing act. I assume that you are using DEQ. If you want to try turning it off (and increasing your sub boost manually to compensate) you can use the bass tone control to add some bass to your front speakers. They should be pretty capable in the mid-bass range, and that could also conceivably add to your chest punch.
Ultimately, I suspect that you may be a little underpowered for what you want from your subs. Sealed subs do not typically produce as much tactile energy as ported subs do, and those are not very powerful sealed subs. When you are in a better position to spend some money, you may want to consider upgrading to something more powerful, and perhaps to ported subs. You could also stay with sealed subs and add something like a Behringer B1200D as a mid-bass module. It is bandwidth-limited to emphasize mid-bass frequencies, and putting one of those directly behind your couch would definitely increase your chest punch sensations.
I hope this helps!