RPG Modex™ Plate

the professor

the professor

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Apr 20, 2013
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I love their design of dispersing the low freq. it certainly works for concert halls and I've heard a room that it has helped but.......

anybody have experience in a small osh listening room? with them. A sound engineer friend says they are 10-15x more effective per SF than a lot of bass trap alternatives.

thanks
 
I use the Modex Plates in my main room, its approx, 18'w x 31'l x 12'h, so not nearly as small as you're talking about. My room acoustics were designed by an RPG engineer. I've been very happy with the results. Unfortunately, I can't give any product comparisons because I haven't tried anything else. Good Luck....
 
annapolis Raider said:
I use the Modex Plates in my main room, its approx, 18'w x 31'l x 12'h, so not nearly as small as you're talking about. My room acoustics were designed by an RPG engineer. I've been very happy with the results. Unfortunately, I can't give any product comparisons because I haven't tried anything else. Good Luck....
Click to expand...

Wow, I just looked at your system, very impressive !
 
Hi professor.
I have also heard great things about the Modex Plate.
Have you bought it ?
If not: Will you buy it?
And what other acoustic products do you have or are you planning to buy ?
Do you have any photos of your room to share on this forum ?
 
Having two, initially, 35Hz Modex plates delivered tomorrow, I will post my thoughts and some measurements ASAP.
Keith.
 
I haven't bought anything yet.

I'm toying with the idea tho. But I really should wait until I get my D5s set up in the room first. Right now I'm using the D1s in that room and I'm certain things will change as I get the D5s installed sometime in the next few months. I hate to do things twice.

The room is weird for me because I have a bad bass node vertically right at my ear level as I stand up. But sitting it sounds great. Even stooping 6" it sounds great. I've never noticed a node vertically before. I'm sure it happens all the time in every room, I've just never noticed before.



PacMan said:
Hi professor.
I have also heard great things about the Modex Plate.
Have you bought it ?
If not: Will you buy it?
And what other acoustic products do you have or are you planning to buy ?
Do you have any photos of your room to share on this forum ?
Click to expand...
 
I have 6 of them. They work great.

I recommend working out exactly the specific modal problems you want to address first. The modex plates are only effective if you place them in the right place in your room. They are also very expensive and, more importantly, difficult to hang on a wall. Once the plate is hung on the wall, you won't want to move it. A very good understanding of the modal peaks and dips at your listening position is mandatory before you order them, IMO.

There isn't a better bass trap I've tried and I've tried a lot of them. The other side benefit is that they don't absorb any HF. Oftentimes folks complain about bare fiberglass panels. They can be effective at wide band LF absorption, but also absorb way too much HF energy. This is oftentimes what folks are reporting as a "dead" or "overly damped" room sound. You could use as many modex plates as you wish and it probably would never make your room sound "dead" in the HF.
 
D Hi, what were your room's specific problems , and where did you end up placing the Modex plates?
Keith.
 
Purité Audio said:
D Hi, what were your room's specific problems , and where did you end up placing the Modex plates?
Keith.
Click to expand...
The issues were length axial modes. My room is 24' long and the room used to ring at 47hz and some harmonics of that frequency. The modex plates took care of that problem. :D
 
dallasjustice said:
The issues were length axial modes. My room is 24' long and the room used to ring at 47hz and some harmonics of that frequency. The modex plates took care of that problem. :D
Click to expand...
Coincedentally my room is almost a identical length ,with the commensurate frequency issue!
I am not sure how many panels I might ultimately need, or indeed how many I can get away with!
Did the subsequent measurements reflect the degree of absorbtion?
Keith.
 
Purité Audio said:
Coincedentally my room is almost a identical length ,with the commensurate frequency issue!
I am not sure how many panels I might ultimately need, or indeed how many I can get away with!
Did the subsequent measurements reflect the degree of absorbtion?
Keith.
Click to expand...
Yes. The room does measure better. I don't have the REW waterfalls anymore since it was a couple of years ago I started putting the plates in my room. When it comes to LF ringing I like using REW and focus on either the spectrogram or the waterfall. My personal favorite is the spectrogram. It's the easiest for me to see the LF ringing problems. The subjective impression I got before I measured was on the order of a radical bass improvement. It's like getting a whole new system. Pretty awesome! I hope you have some really good friends to help you put them up. I would get as many as you can, assuming you have space on the walls causing the ringing.
Michael.
 
We shall see how good my friends are when they arrive, I have been told by RPG ( UK) that they are most effective fitted flush to the wall, we have an older house with picture rails so that might be problematic .
I shall ask a couple of friends to hold them up whilst I measure!
KR Keith.
 
Thanks for showing us the photo, Keith.
If you have ther RPG products too, please show photos of them also.
 
Dallasjustice: Do you have some photos of your room with your RPG products?
 
PacMan said:
Dallasjustice: Do you have some photos of your room with your RPG products?
Click to expand...
4 Modex Plates on frontwall, 2 on back wall. Backwall also has 3 large reinforced RPG BAD Panels offset 4" from wall and some additional tuned traps from GIK. The first picture also shows the sidewall RPG BAD panels and BAD curved. The curved BAD is reinforced and the top BAD panels are offset 4" from wall. I threw in some single shot REW measurements too. Hope you don't mind. :D
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