Originally Posted by Curves
Yeah I remember you recommending the Cap 1400 but I was concerned about the extra weight since I have never had this big a sub before. But now I know, it does not matter that much because you just slide it around anyway. Oh well, at least I know that if I had a 2400 Tall, I won't be concerned about moving it around. Not that I have been thinking about a 2400 or anything like that
I am calibrating using REW Pink Noise. Speakers use "Speaker Calibration" and -30dbFS. This measures 75db. Sub use "Custom 50 100". This measures 86db. I interpret this as +11dB hot.
Chucky, if you measure like this, you would be +16dB hot?
I will have to try +16dB hot in the front. Of course TR and Wind will increase. The house will also shake. I probably won't be able to handle Interstellar at that level.
The sub at the back gives you the TR hitting you in the back. My favorite scene for that is Terminator Genesis Chapter 16 1:47:40 where John Connor Machine lands body blows to Arnold. You feel every punch in your body! I can see why people put MBM's behind their seat.
It's funny how ones +dB hot increases once they get their first real sub. You are in awe of it initially, ears get used to the levels then you want more and try hotter. Then hotter becomes bigger and/or multiple
I have a couple of observations, I would like to add. First, as Chucky said, your subs are always calibrated 10db hotter than your regular channels, because at Reference (0.0 MV) the LFE channel needs to be able to hit peaks of 115db, where the regular channels only need to hit peaks of 105db. When you calibrate your system using an automated calibration system such as Audyssey or YPAO, your AVR will automatically set the subs 10db higher than the regular channels. But, how much more bass you may choose to have, particularly at below Reference listening levels, is purely a matter of personal preference. For instance, if you increase your sub volume by 3db post-calibration, you are running your sub 3db "hot".
Looking at your graphs and listening to your descriptions, I would recommend a second sub, but I would have one at the front of the room and one behind you. I believe that would give you the best of both worlds. Tactile response is not directly tied to either SPL or FR although there is a relationship. But, for instance, we may be able to feel much more TR from a nearfield sub than from one farther away, even if they are playing at the same relative volume at the MLP. That's because the tactile response we feel is only partly the product of SPL. Some of what we feel is transmitted through the floor and furniture, and some of it is direct particle velocity, which we feel more strongly at close range.
If you are seriously considering upgrading to a Cap 2400, I am certainly not going to discourage that. Starting with the most powerful sub you can afford is a great way to go. But, knowing that there are things that you like about both front and back sub placement, I would encourage you to go with duals to achieve both placements and probably a better FR to boot. And, you could still work your way up gradually--perhaps adding a Cap 1400 now for the front of the room with your 118HT as a rear nearfield sub. Then later, perhaps upgrading the 118HT to another Cap 1400, or even to a Cap 2400, and so on. We don't always know exactly how much subwoofage we want starting off, so upgrading is not uncommon.
It's always a difficult decision: one more powerful sub now, or lesser duals. But, although I lean toward having more powerful subs, I can tell you that hardly anyone who has tried duals is ever willing to go backwards to having a single powerful sub again. It isn't just about FR, or adding headroom, although those are important. It's also the sensation of bass and tactile envelopment that accompanies having the sound and feel coming from more than one physical location. Just something to think about.