Only the funnel itself supports the 10 kg of the driver and conducts as well its energy input to the whole system (resonances). My former experiences with Tannoy drivers have always made the baffle board construction, its material choice and its dimension to a delicate decision in order to find the best resonant voice for the full tonal spectrum. The heavy driver is mounted directly to the end board of the funnel. The completed object got screwed from the back using the strengthening frames at the front. At the end I did use a mitered frame design to incorporate the funnel into the housing.
First tannoy dual concentric free#
The implementation of this horn funnels into the final enclosures made several changes in the construction of their mounting necessary in respect to the free sides for the sliding inside cases. The evaluation enclosure with double baffle boards I did not know why? The drivers had been mounted very tight from behind the original baffle boards, which were a solid part of the open box type construction, the funnels just added up as a additional front part. But here now the double baffle did do quite well, even when the evaluating design was almost 40mm of plywood with both layers in sandwich. The middle frequency response get hardened and does not sound very refined and musical. In the past I did learn to fear massive thick double walled baffle boards, they will not work well with a fullrange speaker of the heavy weight class of the Tannoy. So I have realized two wooden funnels and just screwed these in front of my evaluation cabinets. Second I had already evaluated the front loaded horn with other cabinets and did know about its big advantage. As a result I decided to built a extendable cabinet. This sort of simplest extension showed me the effect how such a extension will influence the lower frequency response. These thin boards had been screwed to the back frame. A lot of people do prefer this unnatural sound and get confused meaning the attribute of "warmth" and "rounded".ĭuring evaluation I tested the mechanic extending of the cabinets in order to improve the lf-response with longing boards. With a good horn or in the open baffle the bass response can reach almost natural accuracy and timing, were other principles mostly suffer from a wooly and always slow thick bellied lf-extension, typical for ported designs. After a while I learned to assess the faster, leaner and undistorted bass response of the open baffle to be superior to any other principle I had used with 15'' Tannoy speakers. As the attentive might remember, my first impression was as well a bit thin sound structure, which I needed to accommodate, when coming from a former reflex cabinet with big boost in the 100 hz area. How can it be, that the perfectly made new cabinets didn't work almost in a similar way, when all constructive detail have been tested before with the dummies? All? I made some basic new experiences during the evaluation, first time in my life I did use a 15'' Tannoy Dual Concentric speaker in a open baffle cabinet. One more time it can be said: "never change a winning team…!"It was again one of the moments in life were I was absolutely stroked back from a unexpected effect…!įor more than a half of a year I did use my former evaluation enclosures to work out almost any option for the final design. The former evaluation cases performed very well in this discipline, otherwise I never would have been convinced to overtake the open baffle principle for the new enclosures.
It sounded like with a low frequency control knob in contradictive position. I had the impression below 300 hz all tonality has lost any lower support, below 100 hz it seemed to be like cut off. I did not expect to end my first listening evaluation last week with a complete disaster, the new enclosures did not work at all! These cabinets were not able to show any low frequency response at all. As I already said, I have realized in the past several other enclosure projects for two decades, so I was absolutely safe about the most constructive details evolving with loudspeaker cabinet making. Before I was absolutely save about my knowledge and new ideas which lead to the realizing of my new enclosures. Today I am writing from the position of complete frustration about the first audible results.
0 kommentar(er)
