Originally Posted by Havfan
Center: Klipsch 250c
Left/Right: Klipsch 260f
Surrounds: Klipsch 250s
Atmos: Klipsch 140SA
Sub: SVS PC-2000
A/V: Denon x3400h
I have my setup downstairs with room dimensions 23'7"w x 14'4"l x 6'9"h. This is my first home theater setup and I gradually pieced everything together and am considering adding a 2nd subwoofer. I originally tried the HSU VTF-2 Mk5 and the bass was rather weak. I changed over to the SVS PC2000 and the bass sounds great and there's more of that "oomph" feeling I'm looking for but it still feels a bit subdued during lfe moments (such as the famous Jurassic Park moment). I have a concrete floor with tile over it and plaster walls so I know I'm not going to get room shaking sound no matter what but that's not what I'm looking for. I'd just like have a bit more of that oomph feeling with the lfe (although not to the effect it feels like a shotgun blast to the chest).
I have calibrated the speakers, set the crossovers, and tried nearfield positioning the subwoofer. I have a throw rug in front of the speakers (I sit around 10 feet from the speakers). I'm thinking that it's the room size that is the problem. Would a 2nd SVS PC2000 would help with my problem?
Ed Mullen asked a couple of important questions which don't seem to have been answered, unless you have communicated privately with him. You do have a fairly large room size, but if you have tried the PC2000 nearfield, that should have helped with respect to both increased SPL and increased tactile response (TR). You are correct that you aren't going to get nearly as much low-bass TR on concrete as you could on a suspended wood floor. But, that doesn't mean you aren't going to get any at all, especially with a nearfield arrangement.
Adding a second PC2000 could definitely be helpful, as would upgrading to an even more powerful subwoofer with lower extension, such as a PC4000. But, before doing either of those things, I think you should return to Ed's questions. How much are you turning up the volume on your subwoofer after the Audyssey calibration?
It is important to understand that the goal of your automated calibration and room EQ process is to make all of the channels in your system, including the subwoofer, play at the same volume level, as measured at the MLP. After the calibration, however, you can increase the volume of the subwoofer as much as you like. The best way to do that is explained in Section II of the Guide linked in my signature. The Cliff Notes at the very beginning of the Guide will give you a quick summary of that process.
At some point of course, as you turn up the subwoofer volume, you will run out of headroom and the sub will stop getting any louder and may also make some unpleasant noises. But, nothing in your post suggests you have gotten to that point yet. So, try turning up the volume in your sub, preferably by using the gain control on the sub itself, and see what happens.
Especially considering your room size, you may very well benefit from adding another sub, or even better, from upgrading to a more powerful model with lower extension. The PC4000 would be a good choice for that. But, you will still have to increase your subwoofer volume (post-calibration) to take advantage of the extra power, whether you have one sub or ten subs, so start by turning up your sub gain and see what you think.
Edit: The BOSS platform, which was suggested earlier, could also be helpful for low-bass TR. But, start by maximizing what you have to discover what its limitations are.