Originally Posted by dominguez1
, can you post VS 50-100hz sweeps of with and without the 1200D? Interested to see the difference.
Also, do you have an FR sweep with and without?
I thought I had them on my phone from all the VSing the other day but must have deleted it (I started getting way to many VS measurements going on and was getting hard to tell what was what).
So I just ran the ones you wanted to see again today.
VS for White Noise 50-100 with and without MBM:
Settings for all VS measurements: -5MV with subs -7 sub Trim (not hot) and No DEQ and no weight since it doesn't get a ton of bounce like the ULF 0-50hz White Noise. I ran them with weight as well (5lb bag of rice) but didn't post them. I can if you'd like
All subs only without MBM:
All subs only with MBM:
and the FR with and without MBM (crossover 90hz):
About the FR: I've had prettier FR's before but don't really remember it sounding and feeling better than it does now. Settings on 1200D are 10:00 gain and +10db boost at 60hz
Short version: The MBM doesn't show much of a TR increase objectively with the VS readings compared to with it on vs off, but subjectively is sure does. It does show that it picks it up a little in a few areas (but not a lot) and the reading across the board is a little smoother.
Longer version: Again, the 1200D MBM doesn't show a ton of difference in the VS reading, but subjectively, I can definitely feel it, so that kind of surprised me! But as far as the overall slam and TR goes, the 3 NF sealed 18's right behind me are the bread and butter in my system and are already contributing so much in the mid bass chest kick area. Since messing with this NF stuff over the last couple years or so, nothing comes close (talking subs only here) to the full range TR in my large open room than having them right behind me with driver firing into seat back about an inch away. The ported cap and FV15HP that I used to park right behind me did this as well. The HSU MBM that I've used before and now this 1200D makes a very noticeable difference as well being NF right behind me, even though its not showing much of a TR increase in the mid bass region in addition to what the NF 18's are doing in the VS readings. At least not at the seat cushion location. It might show differently if I were able to take a reading in different areas of the seat back, especially since I have the 1200D behind me up higher on my back on top of the 18's.
I tried to address this a little bit in the post I made for my White Noise 0-100hz VS measurements in the VibSensor thread HERE
I love the VibSensor and I think its an amazing tool to have for multiple reasons. It has helped me to dial in my system's TR better (Time aligning my BK's/MA's better with my subs among other things). It's nice when the VS measurements match up objectively with what we feel subjectively, but is not always the case 100% of the time. At least not with the VS reading on the seat cushion in my experience so far with 1200D MBM added in. Ultimately in the end, what we feel subjectively is the most important, but objective measurements are nice to back that up if possible.