Q&A from "Audio 101 with Anthony Grimani"

Q&A from "Audio 101 with Anthony Grimani"

In April of 2020 we hosted a webinar with audio guru Anthony Grimani. If you happened to miss the session live you can find the replay here:

We had some great questions during the session. Here they are with answers from Anthony. If you have any additional questions feel free to leave a comment or you can always email me directly at jason@avproglobal.com

Q. What model software would you recommend to model the room on the design stage to place components in place? 

A. Unfortunately, there isn’t one piece of software that works for all Home Theater needs.

Start off by getting CEDIA CEB22 and CEB23 Recommended practice documents.

There are some virtualization programs on the market, but I don’t have direct experience with their results. We have developed an in-house tool, but it is proprietary.

Q. What should be the height for side surround & back surround for two row stepped seating, 1 riser of 300mm, provided we have enough distance to avoid localisation.

A. Side and back speakers should be up 15 degrees from the plane of listener ears. That usually leads to about 1.8 to 2m high. With a 300mm platform I would split the difference.

Q. Anthony, what is your opinion about dsp managed double-base arrays with the same SW array on the front and rear wall? 

A. I think you are asking about 4 subwoofers; 2 in the front, and 2 in the back. If that is the case, I am a big fan of this approach, and a big fan of controlling the four subs with individual DSP for level, time, and EQ settings. You can gain up to 12dB improvements in bass levels at the seating area.

Q. Would there be any difference in listening experience by placing 4 subwoofers in 4 corners of the ceiling rather then placing it in 4 corners of the floor? 

A. The results would be different due to vertical standing waves. However, both can be made to work well. Even better is to put to up high, and 2 down low!

Q. Any reason we can't use the ceiling corners for bass traps?

A. That’s a good way to use them.

Q. You said you'd rather bass absorption as opposed to diffusion on a front wall. does that change with di-pole speakers?

A. You can’t really make a diffuser deep enough to control bass waves. They would need to be 1meter (3feet) deep… So the middle of the front wall is best treated with absorption. Also, for good soundstage it is best not to diffuse the middle of the front or back walls.

Q. Does moving the speaker forward or backwards change the position of the peeks and nulls? 

Yes, the frequency series of peaks and dips moves with the position of the speakers. I will have a few slides about this in the April 20 session.