haut-parleur électro-magnétique ; cône diffuseur en papier ; impédance 15 Ohms ; housse en tissu
Informations non disponibles
Grampian Reproducers LTD
Hanworth, Hampton Road, Middlesex
Informations non disponibles
Grampian Reproducers LTD
Hanworth, Hampton Road, Middlesex
Informations non disponibles
Informations non disponibles
Ouvert :
Informations non disponibles
Fermé :
Longueur : 16 cm
Largeur : 33 cm
Hauteur : 33 cm
Diamètre :
Informations non disponibles
Informations non disponibles
Marque : "Grampian Reproducer Permanent magnet Hanworth, Middx".
"Speaking of operations, a delicate but highly successful one has been carried out in striking the balance of correctly matched voice coil and curvilinear cone for our new 12" loud speaker. By carefully suiting the weight of coil to cone we have reduced the peaks and secured a freedom from break-up, while the very high flux density of the large Alcomax magnet considerably increases the sensitivity, especially in the higher frequencies. All very worth while as you may see, or rather hear. Voice Coil Impedance 15 ohms. Fundamental resonance 60 cycles. Flux density 14 000 lines per. sq. cm. Fixing holes 4 holes" (publicité non datée).