I am currently embarking on a project to predict the performance of an L1 Model 1S in a church auditorium using Bose Modeler and compare this predicted performance with that of a Panaray MSA12X mounted in the identical location and at the same height and orientation.
Feel free to join this project if it interests you.
Link to Sketchup file: "Modeler Church Auditorium Evaluation":
https://3dwarehouse.sketchup.c...uditorium-Evaluation
Link to corresponding Modeler mdr file:
https://drive.google.com/file/...2MZ/view?usp=sharing
Edit: Moved links to files to this discussion. The project is out of scope for the Bose Portable PA Community.
Bose Pro Community Admin
Oh, I'm stuck, there doesn't seem to be any data in the Speaker Database for L1 Speakers. Can anyone help?
Hi @ThomasS-at-Bose,
The learning center has changed considerably since I last visited last year. Sadly records of the old Webinars I watched last year don't seem to be available anymore.
The one I am trying to locate is where Shawn Watts (I think) demonstrates D2RASTIc design using a pair of MA12 Speakers. He had one for the left channel and another for the right.
He demonstrated a particularly useful technique where he placed a head height partition down the center of the church and then showed how this partition could be used to reveal the beam shape contribution from each speaker.
I would like to adapt this technique to the model I'm working on. However, as my model will have a single speaker located on the centre line of the church I would need to place the partition diagonally from the left from corner to the back right corner of the auditorium.
The following linked graphic helps Illustrate what I mean: Auditorium looking towards stage.
The partition would pass through the person sitting in the front pew and extend back, passing through the person in the rear pew in the opposite corner.
Would it be possible for me to gain access to that old webinar? If not, would someone more proficient with Modeler (that would be just about anyone at this stage) like to develop the mdr file I've provided? ( option 2 would be preferable to me )
Thanks.
PS. Just realised that people in my graphic should be sitting on the other side of the audio and the above-mentioned diagonal partition should similarly run in the opposite direction so that the beam shape can be viewed in the conventional way, ie. with the stage to the left of the screen.
Hi @ThomasS-at-Bose,
Thanks for confirming that all the tutorials are there. I looked a little more carefully this time and found the tutorial by Bruce Hurst (not Shaun Watts) that I was after.
It was the section you stated.
Subsection:
Modeler: Advanced Acoustic & Loudspeaker Simulation Software - On Demand
Part:
5. Designing Bose MA12 and MA12EX Line Arrays
Kind regards,
John
Bruce,
Thanks so much for your help and for steering me in the right direction wrt the place of the vertical wall and settings to correctly interpret coverage patterns.
With this guidance, I manage managed to reproduce the statistics you achieved.
I've inserted the following image for the sake of readers that like me are on the steep part of the learning curve wrt Modeler etc.
Uncle_John
Bruce,
L1 speakers are located behind the talker/performer so they monitor the direct sound the audience hears. The L1 Model 1S has a separate Bass module that sits on the floor. As far as frequency response and range are concerned I accept that the MA12EX would be a better match but what I really wanted to do was compare the performance of the line array component of L1 Model 1S with the Panaray MSA12X. Correct me if I'm wrong but I suspect the MA12 is a closer match to the line array component of the L1 Model 1S.
I wanted to evaluate the advantage of the beam adjustment included in the MSA12X. So I've created two models, one using the MA12 and the other using the MSA12X:
MA12: https://drive.google.com/file/d/1ZrhUSTAU3oH6w4Uck3OdCcbWpvLuAuEa/view?usp=sharing
MSA12X: https://drive.google.com/file/d/1Iu0rhgXaSb-vE4vtq9eyfQAJavgvxLJ6/view?usp=sharing
Pitch/Steering is identical for both speakers as is location etc. The only properties that are different are the beam angle settings for the MSA12X.
The following image compares the direct field coverage at seated ear height for the two models:
I welcome any comments.
Bruce,
The model with the level floor in earlier posts is for our new church. Our current worship venue has a raked floor.
So I had a go at modeling that.
Here is a link to that model that includes the MAS 12X:
https://drive.google.com/file/d/1r-K3v_ZCx-UNlkan0l3PE17IBM4NPkT-/view?usp=sharing
Here is a screen shot of the direct field:
Modeler seems to have automatically included a vertical partition down the center aisle. This is great because in the previous models we created a similar partition manually.
The problem is I don't know how to turn it off. Could you please help?
Thanks for your reply. Being able to turn mapping in these planes on and off so easily is a great feature.
Hi John,
you should be able to mimic the L1S by using a single passive MA12EX module. It'll have different EQ, but that may not be relevant for the comparison you'd like to do.
Best rgds,
Thomas
John,
I ran across you post again the other day.
If you have not finished your evaluation, this may help.
You had talked about running a wall diagonally across the room from the front corner to the rear corner in order to try to map the coverage pattern. Unfortunately, I don't think that will give you a good picture of where the pattern would cover.
What I suggest is putting a vertical wall directly on axis of the speaker, just like we do for the MSA12 and look at the coverage pattern that way. I usually make the bottom the height of the pew backs and the top a little higher than ear height at the back of the room. I try to get the beginning of the wall away from the speaker if I can to get a better look at the pattern.
You can look at a example I put together with a triple stack of the MA12EX at the link below.
Link to model
Let me know if you have any issues with downloading the model.
Bruce Hurst
Hi John,
please make sure you have read the Design Guide for the MSA12X. It contains valuable information about how to best utilize the beam steering, how this is simulated in Modeler and how the ControlSpace environment is set up.
The vertical mapping can be turned off in the properties for the array.
best rgds,
Thomas
Hi John,
all tutorials shall be available also in the new learning center.
Please register under this link and check the Design Tools section.
best rgds,
Thomas
