Sub-dude and omni-mic

[KEW]

Has anyone posted a link or can somebody measure in-room FR and decay for their system with and without the subdude (or gamma)?
I have a sense of what a sub dude is intended to do, but seeing it on a graph would be enlightening!

 

[j_garcia]

Never really seen a graph, but the difference was certainly audible in my case. I still have my Gramma but don't use it with my current sub.

 

[KEW]

Never really seen a graph, but the difference was certainly audible in my case. I still have my Gramma but don't use it with my current sub.

So...you're telling me the difference is apparent, but not worth using it even if you already have one?

I've already got one I use with my SB-12+, but I have a couple of micro subs and wanted to see how much effective the sub-dude is in the (extension = 40Hz) region of these micro subs.

 

[j_garcia]

The Empire transmits no sympathetic resonance Parallel Drive. Because of this, the Gramma makes no difference with it. With my previous Sonotube Tempest, it made an immediate difference; the majority of the improvement seemed to be higher up, but a smaller sub will likely already not have as much resonance transmission through the cabinet so I would say a piece of foam would be sufficient as opposed to a Subdude or Gramma. I got rid of the Tempest but kept the Gramma

 

[Beatmatcher247]

I notice a big difference with Auralex Grammas underneath my JL's. I can hear the different notes more distinctly than I could before. It greatly reduced, by 50% or more, the resonant noise of ductwork, can lights, etc... It also helped a lot with the bass carrying through to the rest of the rooms in my house. My neighbor said it didn't help with it carrying to his house though, he says he has an easier time guessing what I'm listening too now.

Whether or not the difference is measurable, I don't know. I haven't drug my buddy over with all of his measuring gear since we got them positioned correctly and level matched. If I had to guess, being able to hear different notes more distinctly than before can be chalked up to less unwanted noise from structure, can lights, etc... than having a positive impact on my frequency response curve.