Infrequent Sound [sex.tex] technology: Dynaco A-10 Aperiodic, 1971, made in Denmark

The speaker system which adopted the damped bass-reflex system.

They are A-30mkII and A-25mkII with the almost same design except the aperture of a Woofer.

The damped bass reflex filled up with special glass fiber opening of the lattice which is a bass-reflex system of half-braking structure, and is in the baffle lower part, and has given the air system of the grade to the Woofer. Moreover, the sound-absorbing material in which the acoustic absorption coefficients of glass fiber and rock wool differ is doubly stuck on an enclosure wall, and internal reflection is reduced.

The influence of a vibration of opening which loses fault braking of the Woofer which tends to be produced with a perfect encapsulated type, and is indicated to be a bass-reflex type fault from this structure is suppressed.

The 18cm corn type Woofer is carried in low-pass.

Not the heavy vibration system of the long voice coil often looked at by the Woofer of a perfect encapsulated type etc. but the light vibration system which took the small amplitude is adopted.

The tweeter of a dome shape is carried in the high region.

The lightweight diaphragm is adopted like a Woofer.