What are good measurements? Please!!!

[Joffieb]

I have been using REW for years now and read hundreds of posts but the one thing that I have struggled to find answers to is, "What is a good measurement?"

Floyd E Toole says, (rightly or wrongly) speakers that measure well, sound good in blind tests, BUT what does "measure well" mean?

For the SPL I may have seen that the whole measurement must be within 10dB, or no peak or null should be more than 5 dB from the middle.

So please someone answer:

1. What is a good SPL reading? (What smoothing is okay to apply when looking? to me 1/1 gives a very but readable view)
2. What is a good distortion graph? (at what frequencies)
3. What is a good spectrogram?
4. What is a good IR or Filtered IR reading?
5. Any other widows that indicate a good set up/room?
6. What is Rt60 and what's a good one to aim for?
7. How can I get my SPL to show +/- 10 dB range with 0 in the middle?

Thanks!!!

 

[voodooless]

Understanding Speaker Measurements (Video)

Per popular demand, I recorded a long (1 hour) video on how to read speaker measurements but also, the underlying research (and physics) that mandate some of those concepts. Also covered is equalization and listening tests (briefly). As usual, my videos are "one take" directly recorded and...

www.audiosciencereview.com