QDA-23 Quadratic Diffuser Absorber

The QDA – 23 are two units within one . First, a quadratic diffuser based upon prime number 23 with a diffusion frequency response starting at 185 Hz. and going through 3,450 Hz. Behind the prime 23 quadratic diffuser is our activated carbon broadband low frequency absorber from 30 Hz. – 400 Hz. At the base of the QDA-23 is our more frequency specific carbon absorber from 30 Hz. – 50 Hz. The QDA–23 comes in three units. Each of the two diffuser sections measures 27″ w x 60″ h x 17″ deep and weighs 275 lbs. Together they are 55″ wide. The ACDA-12 base measures 55″ w x 12″ h x 17″ d and weighs 175 lbs. Total weight for the units is 725 lbs.

– ACDA-10 Riverbank Test Result

– ACDA-12 Riverbank Test Result

Have you ever been in a grand recording studio or music hall, such as Carnegie Hall in New York, and experienced the sensation of hearing music with complete clarity and separation? Ever been so moved by a live performance that the music actually became a part of you and brought a tear to your eye and a lump to your throat?

Then, you know what its like to hear the vocals so clearly defined and separated, that the natural timbre of the singer’s voice is able to move you emotionally with every note sung. You feel the wonder that comes from being able to hear each and every brass and string instrument shining through on their own. That can only happen when both the equipment being used to produce the sound and the room you are listening in actually disappear and all that is left is just you and the music.

Now imagine being able to enjoy that same involvement only at a higher and more intimate level in your own personal listening room, home theater or professional recording studio. Imagine hearing that same attack and decay control the singer shares with you in every breath and note right there in your room. And imagine hearing every bass note attack and decay coupled with separation and definition.With the Quadratic Diffuser Absorber, QDA, that involvement can be achieved like never before. When you experience diffusion, it’s like having cataracts removed from your eyes. A vale is lifted from your musical presentation, so you can hear everything more clearly in its proper place and in its proper order with a clarity and separation you will never have previously imagined was possible.

You create a new sound field that has a width and height where all the instruments and vocals are laid out and separated from each other, just enough so that you hear each and every one separately but still all together. You can literally “see” the distance between the guitar player and the lead singer. You know where the drums are and you can feel the physical distance between each and every singer and instrument on the sound stage.

What Will You Experience?

• You get a quadratic diffusor, the most time tested and proven method of diffusion in the world, fused with my low frequency activated carbon, which gives you incredible separation, definition, and additional timbre quality to your precious mid range and vocal, so you can hear more of everything that’s really important!
• Your QDA will feature a series of wells of different depths which can be tuned to your specific room and music to handle different frequencies and give you a larger and deeper sound stage so you can hear your mid range and vocals as clear and clean as if you were in the studio with the musician.
• You can enjoy diffusion from 200 Hz. all the way up to 3,400 Hz. along with a broadband, low frequency absorber technology using activated carbon filters. Now you have a diffusor/absorber that starts absorbing energy at 30 Hz. and moves through 200 Hz. Add it all up and you get middle range diffusion and low frequency absorption all in one beautifully crafted unit. You now have a product that does two things incredibly well. This is a first in acoustical products.
• You get a QDA cabinet that is made of solid wood and set on castors which allows you to position your units for proper room tuning and acoustically knocks down the walls and ceiling of your room so you can open up your music to a more real and lifelike presentation. It’s like overnight, you will have a new speaker, new amp, new cables, and a new room. You will elevate all 4 of these major components of your system to a much higher performance level by adding diffusion and minimizing the impact of the box in which you must listen to music, namely your room!
• You get a proprietary acoustic technology which you can position in a vertical or horizontal manner to achieve two dimensions of sound diffusion so you can finally escape room distortions and room modes, and enjoy a listening experience that only a very select few people in the world ever get to experience at home.
• You get to choose what stain and finish you want so it perfectly compliments your room decor and gives you an incredibly intimate listening experience without compromising the look of your room, ensuring no complaints from your significant other!

These are the same low frequency absorption rates and levels that professional recording studio designers incorporate into real world recording studios design and construction builds.

So if you’ve bought what you thought was a low frequency bass absorber and its not dealing with frequencies below 100 Hz., then you’re missing out on a world of incredible sounds and pleasure in your music because not managing your bass in your room causes masking of your precious middle range frequencies. With the QDA we get the low frequency problems in your room out of your way so they do not mask your precious middle frequencies. And then, with the diffuser, we take all that new energy that you have never heard before, because it’s been covered by the low frequencies until now, and we spread it out into the room so you can enjoy incredible intimacy with your music like never before.

So avoid listening to a compromised sound for a minute longer. You’re missing out on so much more from your music than you could possibly imagine. Your music system is producing all the sounds you need to hear but your room is not letting you hear them. Let’s finally allow you to experience the true power of what your expensive amp and speakers are producing!