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Variovent Misc Dynaudio A/S; Skanderborg, build 1988 ??, 2 ...
https://www.radiomuseum.org/r/dynaudio_variovent.html
'Variovent' is a "physical" resistor of about 100mm Ø, to be mounted in the backside wall of closed speaker cabinets. It's purpose is the suppression of the peak resonance frequency of the bass driver(s). Dynaudio recommended one 'Variovent' up to 50 litres box volume, two up to 80 litres, and three for higher volumes. Price in first year of sale
Variovent Dynaudio (2) Ports For Sale - US Audio Mart
https://www.usaudiomart.com/details/649398358-variovent-dynaudio-2-ports/
Dynaudio Variovent 1 pair for $40. These fit in a port coupled to the box. See the URL for a more technical explanation of its use.
How about the sealed box with "variovent"? | diyAudio
https://www.diyaudio.com/community/threads/how-about-the-sealed-box-with-variovent.17089/
Dynaudio also used them as resistive structures in the interior of asymmetric isobaric enclosures. One of the best speakers I ever built used a 30W54 on the outside, 21W54 on the inside at right angles to the 30W, with the 21W firing through a …
Aperiodic Loudspeaker Enclosure Design
https://diyaudioprojects.com/Technical/Aperiodic/
Photographs of a Dynaudio Variovent and a ScanSpeak Flow Resistance Vent are shown below. Photograph 1: Dynaudio Variovent. Photograph 2: Scanspeak Flow Resistance Vent. The purpose of an aperiodic design is to allow a smaller enclosure size than would normally be possible in a sealed box. If a driver is placed into a sealed box that is too ...
Dynaudio DIY d28/2 + 17w-75 06 BR vs. Variovent - …
https://www.youtube.com/watch?v=62cxZuXvNuA
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How about the sealed box with "variovent"? | Page 5 | diyAudio
https://www.diyaudio.com/community/threads/how-about-the-sealed-box-with-variovent.17089/page-5
Hello I have a pair of Dynaudio 17W75 woofer and D-28/2 tweeter. I like the Dynaudio 17W75, it have very clean sound, but it have only 85dB for the SPL at 1W/1m , I would like a loudspeaker box who would boost the overall efficiency of my Dynaudio 17W75 and having a clean sound. It...
Buy high end loudspeaker series Contour 1 - Dynaudio
https://www.dynaudio.com/discontinued-models/contour/contour-1/
The astounding low-frequency characteristics are achieved by a woofer driver with a 75 mm voice coil, which was especially designed for this system, and by the Dynaudio Variovent. It features a linearized impedance response and phase-correction circuitry; and, like its larger relatives, it is equipped with a frequency crossover of utmost ...
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