Sound Diffusion / Absorption

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  • Many times in our studios we have a need for both diffusion and absorption. Bringing in separate units is not easy and definitely not cost effective. With our diffuser absorber studio (DAS) units you have both diffusion and absorption both in one unit. The unit is on casters so mobility and positioning is much easier than with free standing units.

    Diffusion can add air and separation to your instruments and vocals. A properly diffused sound field is a necessity in today’s recordings where absorption is used improperly. All rooms require the ability to absorb access low frequency energy no matter what the room dimensions and volume. Both of these features are now combined into one portable unit.

    Units are clear coated commercial grade MDF. This simple finishing technique is cost effective and seals the unit from moisture. Casters are rated at twice the load they are carrying and have double wide wheels which insure the ability to position them easily in tight places. Fabric color and texture options are numerous.

    There are three diffusion options you can work with. The quadratic diffusion options are based upon prime numbers 7,11, and 13. The higher the prime number, the more octave band coverage. especially at lower frequencies.

    • The DAS – 7 offers diffusion from 850 – 3,450 Hz. and our carbon absorption from 30 – 400 Hz. Units measure 24″ w x 60″ h x 16″ d and weigh 225 lbs. on casters.
    • The DAS – 11 offers diffusion from 375 – 3,450 Hz. and our carbon absorption from 30 – 400 Hz. Units measure 24″ w x 60″ h x 23″ d and weigh 250 lbs. on casters.
    • The DAS-13 offers diffusion from 275 – 3,450 Hz. and our carbon absorption from 30 – 400 Hz.Units measure 27″ w x 60″ h x 24″ d and weigh 275 lbs.on casters.
  • image of a QDA 11 Sound Diffuser Absorber
    image of a QDA 11 Sound Diffuser Absorber

    The QDA – 11 is two units within one. First, a quadratic diffuser based upon prime number 11 with a diffusion frequency response from 385 Hz. – 3,450 Hz. Behind the prime 11 quadratic diffuser is our activated carbon broadband low frequency broadband absorber from 30 Hz. – 400 Hz. Broadband lower frequency absorption is required in all small rooms. The absorption performance is the same as our ACDA-10 unit. At the base of the QDA-11 is our more frequency specific carbon absorber from 30 Hz. – 50 Hz. This base absorber is designed after our ACDA-12 unit and offers large amounts of absorption from 30 – 50 Hz. which is the frequency range of unwanted pressure issues in the majority of today’s smaller rooms. The QDA measures 24″ w x 60″ h x 9″ deep and weighs 225 lbs.

    – ACDA-10 Riverbank Test Result

    – ACDA-12 Riverbank Test Result

    Diffusion and lower frequency absorption goes hand in hand with the front and rear wall locations. The front wall is an area of high unwanted low frequency pressure and the rear wall follows the same pattern. Low frequency energy builds up at the boundary surfaces of  front and rear wall locations. You need both a frequency specific and a broadband absorption approach to deal with the magnitude of these low frequency pressure issues.

    The QDA-11 was designed for those who do not have the physical space requirements to accommodate deeper units but still want the advantages of broadband and frequency specific absorption along with the diffusion benefits offered by quadratic diffusion.

    If you order the QDA today you will also get

    • A free one 30 minute phone or video consultation on your room mode issues with me, the products inventor, Dennis Foley
    • A 100% risk free 30 day money back guarantee
  • image of a QDA 13 Quadratic Diffuser Absorber from Acoustic Fields
    image of a QDA 13 Quadratic Diffuser Absorber from Acoustic Fields

    The QDA – 13 are two units within one. First, a quadratic diffuser based upon prime number 13 with a diffusion frequency response starting at 285 Hz. and going through 3,450 Hz. Behind the prime 13 quadratic diffuser is our activated carbon broadband low frequency absorber from 30 Hz. – 400 Hz. At the base of the QDA-13 is our more frequency specific carbon absorber from 30 Hz. – 50 Hz. The QDA measures 27″ w x 60″ h x 16″ deep and weighs 275 lbs.

    ACDA-10 Riverbank Test Result

    ACDA-12 Riverbank Test Result

    The Quadratic Diffusion in the QDA takes your sound and spreads it out across your room in the way nature intended you to hear it without your room getting in the way. Your room prevents this naturally occurring sound-field from happening because it has 4 walls, a floor, and a ceiling. Diffusion minimizes the reflections that want to destroy your precious direct sound from your speakers. Whilst reflections from room surfaces help you localize and define sound and distance, these reflections must be managed through diffusion so that the reflections do not get in the way of the sound coming from your speakers. This is why your ears are longer than they are wide.

    With the QDA you will finally get to experience the involvement that your expensive speakers are producing but which your room is stopping you from hearing. Through no fault of your own you have become so used to, and accepting, of poor diffusion in your room that your ears and eyes will open wide when you hear Quadratic Diffusion for the first time…Seriously, words fail to describe just what an impact diffusion has until you try it for yourself!

    If you order the QDA today you will also get

    • A free one 30 minute phone or video consultation on your room mode issues with me, the products inventor, Dennis Foley
    • A 100% risk free 30 day money back guarantee
    • And castors so you can move the units in and out of your room if your listening room serves multiple purposes.
  • Image of a QDA 17 Quadratic Diffuser Absorber
    Image of a QDA 17 Quadratic Diffuser Absorber

    The QDA – 17 are two units within one. First, a quadratic diffuser based upon prime number 13 with a diffusion frequency response starting at 225 Hz. and going through 3,450 Hz. Behind the prime 17 quadratic diffuser is our activated carbon broadband low frequency absorber from 30 Hz. – 400 Hz. At the base of the QDA-17 is our more frequency specific carbon absorber from 30 Hz. – 50Hz. The QDA measures 37″ w x 60″ h x 17″ deep and weighs 325 lbs.

    ACDA-10 Riverbank Test Result

    ACDA-12 Riverbank Test Result

    Want the ultimate in musical involvement? Looking for an emotional connection and experience each and every time you play your music? Then our flagship Quadratic Diffuser Absorber is for you.

    • An acoustical industry first; Middle range diffusion and low frequency absorption all in one beautifully crafted unit.
    • The quadratic diffuser 17 gives you diffusion from 225 Hz. all the way up to 3,400 Hz. This provides you with incredible separation, definition, and additional timbre quality to your precious mid range and vocals.
    • The low frequency absorber starts absorbing energy at 30 Hz. and moves through 200 Hz. so your bass instruments are both powerful and clear.
    • The combined effect is a larger and deeper sound stage than you will have ever experienced before so you can hear your mid range and vocals as clear and clean as if you were in the studio with the musician.
    • A beautifully crafted solid wood cabinet designed to match your room decor.
    • A unit that measures 35″W x 60″H x 18″D and weighs 250 Lbs.
  • Image of a QDA-23 Sound Diffuser Absorber
    Image of a QDA-23 Sound 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

    Want the ultimate in musical involvement? Looking for an emotional connection and experience each and every time you play your music? Then our flagship Quadratic Diffuser Absorber is for you.

    • An acoustical industry first; Middle range diffusion and low frequency absorption all in one beautifully crafted unit.
    • The quadratic diffuser gives you diffusion from 200 Hz. all the way up to 3,400 Hz. This provides you with incredible separation, definition, and additional timbre quality to your precious mid range and vocals.
    • The low frequency absorber starts absorbing energy at 30 Hz. and moves through 200 Hz. so your bass instruments are both powerful and clear.
    • The combined effect is a larger and deeper sound stage than you will have ever experienced before so you can hear your mid range and vocals as clear and clean as if you were in the studio with the musician.
    • A beautifully crafted solid wood cabinet designed to match your room decor.
    • A unit that measures 36″W x 60″H x 20″D and weighs 275 Lbs.

Showing all 5 results

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