ALTEC 211 TYPE フロントロードホーンの作り方(How to make front loaded horn)

ALTEC 211 type, 10cm double front loaded horn speakers. Currently up for auction on Yahoo! https://page.auctions.yahoo.co.jp/jp/... [About Front Loaded Horns] Front-loaded horns are loaded at the narrowest part (throat) and amplify the mid and high frequencies with a horn that gradually widens. The 211 is a combination type enclosure with bass reflex for low frequencies. The horn section is not made of thin bent plywood, but is formed into a single sheet by pressing and laminating plywood. The high rigidity of the horn produces a high pitched sound when struck, and the density of the material is uniform. This feature leads to suppression of excess resonance and overtones, resulting in excellent acoustic characteristics.