
ssabripo
Audioholic
craigsub said:Sherv - Let me try this with some humor mixed in. Taking any number of subwoofers and measuring them in a 4Pi setting with LMS will have ALL of them looking like crap, when compared to a smoothed graph done 2 Pi.
Yes, the SVS looks worse when done 4 Pi. So would my Velodyne DD-18, and your DIY project. The Axiom looks crappier there, too.
However, if you want to see REALLY crappy graphs - run some unsmoothed graphs of a subwoofer in any room.
I will be posting some 10 to 50 Hz in-room graphs this weekend. I top out at 50 Hz because I crossover my system at 50 Hz.
Anyway, the LMS curve done 4Pi is a total anal exam of what the subwoofer is actually producing, with no interference from any other source. Why that fact (and it is fact, regardless what anyone trying to argue with it says) upsets people is beyond me.
Keep in mind, I personally do GP measurements, but stating that 4Pi is more accurate than what I personally do does not seem to offend my masculinity ...![]()
good stuff!
1. you are right...LMS is "better" and more detailed. Nobody should deny that (I certainly dont). I think the issue is with the notion that "ONLY LMS is right" that you know who spills. TrueRTA at 1/24 is just as good to get a picture of what is going on, and that is the point of contention I think. We all agree LMS is the flagship, and also VERY expensive, and that RTA serves its purpose just as good. Therein lies the "anality" of things
2. No disagreement there: measurements in room and at GP are fine when taken into context. My only point is that those graphs from Axiom mean beans to me and many others, because of how they were taken...you know that story all too well. I look forward to seeing more of your measurements and graphs....I hope I learn from my measurements too! I will be doing some of both the Ultra and my DIY at GP starting this weekend. The room response will be interesting to see....