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Patented Integral Coaxial Speaker Cone Technology
A driver that utilizes the Dinaburg Technology IP consists of five basic elements:

    1. The Active Portion which contains the motor structure for an entire Dinaburg-based driver.
    2. A Rigid ring which enables independent motion between the active and stabilizing portions of a Dinaburg-alignment driver.
    3. Inner Surround of the Stabilizing Portion.
    4. Stabilizing Portion of the Dinaburg alignment driver. This element is what improves the performance of a conventional driver. The stabilizing portion can be conical or flat. A flat, or nearly flat, stabilizing portion can enable shallow finished products to be developed without having to sacrifice bass performance.
    5. Outer Surround of the Dinaburg alignment driver.



Many industry-standard tests (frequency response, distortion, etc.), were performed by independent test labs using Audio Precision APX 500 Series analyzers and GRAS measurement microphones. One lab, Warkwyn based in Minneapolis MN, performed laser scans and directional measurements using the Klippel R&D System. Drivers based on Rice-Kellogg design in various diameters, were measured and then modified using the methods described in the
Dinaburg patent.


Frequency Response and Distortion Comparison of Original Proof-of-Concept - 5” conventional midrange and it's corresponding Dinaburg Design


This is a frequency response comparison of a 5” conventional midrange driver and a hand-built version implementing design principles in the Dinaburg patent. Both drivers were tested in sealed enclosures of equivalent volumes separated by a common wall. The gray curve is the conventional midrange and the green curve is Dinaburg version.



Frequency Response and Distortion Comparison of Original Proof-of-Concept – 1.75” headphone driver and it's corresponding Dinaburg Design



A 1.75” headphone driver for a low-cost headphone (retail price under $50 USD) was modified adding the additional passive surround (stabilizing part as described in the patent). No other modifications were made and the modified headphone driver was powered with the same external headphone amp at the same power level. The conventional driver response varies by more than ± 5 dB from 40 Hz to 500 Hz. For the Dinaburg design, the response varies within a much smaller range (± 1.5 dB) between 40Hz and 500Hz. Low frequency output for the Dinaburg design is boosted by 3.2 dB at 70 Hz and slightly more than 6 dB at 40 Hz.



The Dinaburg design has considerably less distortion. From 85 Hz onward, the Total Harmonic Distortion (THD) is 1% or less. The THD of the conventional driver does not drop below 1% until 280 Hz.

Contour Plots of Original Proof-of-Concept - 5” conventional midrange and it's corresponding Dinaburg Design

Contour Plots were created at Warkwyn in Minneapolis, MN using the Kippel R&D System.
The conventional midrange SPL is 70 dB on-axis starting at a bit above 200 Hz. This Dinaburg design is at 70 dB a full octave lower (100 Hz). Interesting behavior for the Dinaburg design is that it has almost no output below 90 Hz (dark blue area) at the rear of the enclosure (+180 and -180 positions) whereas the conventional driver still produces around 10 dB more level at same measurement position. This is evidence that a single-driver subwoofer based on the Dinaburg design may be a very effective cardioid sub. Even traditional 2-way and 3-way speaker systems can benefit with ensuring less low-frequency energy is bouncing off the walls behind the enclosures. In addition, 3-way speaker systems may be rendered obsolete because the midrange and woofer can be combined as one driver.

Patented Integral Coaxial Speaker Cone Technology


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