Originally Posted by Pres2play
BeeMan, I'd like to install REW on my computer so I can see the frequency response with AntiMode, but I don't want to run cables from the PC to my preamp or sub to generate the required test signals. Can't I just play the Subwoofer Sweep Test from a calibration disc and fore-go the cables?
I don't know. If doing a real time analysis (RTA), you're fine. But part of the REW measurement phase includes playing an included sweep so everything is automatically integrated; playing sweep/recording sweep/analyzing results of recorded sweep/graphing results of everything else that came before/additional graphing capability. The point, REW is comprehensive with what it does with the recorded information. In my opinion, one is seriously shortchanging REW by trying to change what REW does. Why the resistance to running the cables? If like the rest of us, with WAF towards cables, we set up, do our sweeps, break the system down, give the wife time to get over it and repeat. What good's a relationship that doesn't have good old fashion dynamics in it?
Also, I want to use my RS SPL meter for the test. Now, I've heard a lot on this site and others about mic calibration and the Shack meter also needing some correction. Is this something anyone can do?
If you can connect the RS sound meter to your system, there's no reason you can't use it. From reading about specifications for other sound meters, other then it's frequency limited to, I think 31.5Hz, it will do fine. Below is more information on the matter.
"Weighting: The weighting affects how sensitive the microphone will be over a given frequency range. It lets you choose between Weighted A and C measurements. “A-Weighting” reduces the frequency response of the SPL meter to the 500Hz - 10,000Hz range, where human ears are more sensitive, while the “C-Weighting” will make the meter respond to the frequency range from 32Hz to 10,000Hz.
For Home Theater use, the wider C-Weighting is recommended."
Obviously, we need to be able to measure will below this limit. Hence the need for a recording microphone with better capabilities.
I plan to test the AntiMode right away with the "The Dark Knight Rises," Blu-ray disc. The bass in the opening scene is quite a challenge for the subs in my room. If AntiMode can tame standing waves as advertised, I should hear a big improvement in my setup during this scene.
I don't know if I can say that it will tame standing waves as our room has naturally occurring standing waves and there's nothing Anti-Mode can do to correct for this waves. You won't become aware of these naturally occurring standing waves until you get REW up and running.
Originally Posted by Skylinestar
I'm sure many people are not able to place their subwoofers at the perfect spot due to WAF issue. That's why we need Antimode. It's better than nothing.
Yes, the WAF is a powerful force indeed. As I type these words this force is all around me.
Forgive me for my insistence but from personal experience, if the subs are not properly integrated, the Anti-Mode is not worth the price. As an owner and fan of Anti-Mode, I'd rather someone acquire room analyzing capabilities/skllis first and do the best they can integrating their subs into their room's acoustics. This includes familiarizing themselves with getting the best out of parametric settings; phase, LPF settings on both the sub and the AVR, gain controls in the AVR and on the Sub, placement issues as a foot or two will make major differences. One should learn about how acoustical room measurements benefits by using asymmetrical settings and one needs to take their time to explore time domain issues. After doing this, one will gain the most benefit from their Anti-Mode. See the Anti-Mode unit as polish and if seen in this light, one will get the best out of their subwoofer system. If done the other way around where the Anti-mode is installed without aid of a room analyzing program and room integration efforts, my opinion, they've thrown their money away and more often then not, will be disappointed in the results Anti-Mode provides.
Those are my honest, personal feelings on the matter based on personal efforts. If someone thinks I'm wrong in my above, then I encourage them to ignore my above, buy and install a Anti-Mode unit in their sonic chain and I hope they'll have a nice subwoofer based life.
My plans are, after I finish exploring the DSPeaker, Anti-Mode, to explore the MiniDSP and it's ability to integrate with REW. Personally, I'm not convinced that Anti-Mode is giving me the best my system has to offer.
-Edited by BeeMan458 - 2/5/13 at 9:07am