From a morning, I want to make the same speaker as ALTEC, I think various size, I decide to make the size of 1/8. Although it took about one week to make, the front load was the most difficult, and especially the angle was serious. (Photograph)
It was easier to make amplifier. Although I thought that the structure is little different from real ALTEC, since I also thought the intensity, I used a single board, and made the board into which a speaker unit is put, and made the hole for the lower portion squarely. I think that intensity is maintained more than a real one (photograph).
I used the 8inch's speaker unit of the full range of ALTEC, I felt high range is short, Since I tried to connect the tweeter of Coral( I bought it at Hi-Fi-Do), It is very nice.
I tried to condenser Bita Q oil 0.22, Bita Q oil 0.47 or film condenser of 1.0 etc, As a result of experimenting, Bita Q oil 0.22 was the best. Because if I used 0.22, I can hear this sound at the nearest of it, but at the point Of 5m of it, I could not understand sound has come out or not, If I used 1.0, I understand sound has come from the tweeter. At my ear, I think it is good to use 0.22. It is not so difficult to make. How about seeing a photograph and making it reference?