ESS LS4
Price unknown (1 unit, around 1970 s?)
Commentary
A floor-type speaker system developed as the top-of-the-line model of the Tempest series.
A small Hail driver is used for the high range.
The Hail driver has a structure in which Teflon accordion pleats are placed in a strong magnetic field and elements (conductive bands) are embedded in the sides of each of the pleats.
When a signal is applied to this element, an electric current flows and the movement of the folds compresses air and emits sound into space.
Because the voice coil radiates sound directly into space by this operation, excellent damping characteristics and low distortion factor are achieved.
A 25 cm cone woofer is used for the lower range, and a 25 cm passive radiator is installed to improve the lower range playback.
The enclosure is made of oak.
Model Rating
Method | 2-way, 2-speaker, passive radiator system ・ Floor type |
Units Used | For low band : 25 cm cone type High Pass : Small Hail Driver Other : 25 cm passive radiator |
Frequency characteristic | 35 Hz to 20 kHz ± 3 dB |
Output sound pressure level | 96dB/W |
Allowable input | 160W Clean Power |
Crossover frequency | 2.4kHz |
External dimensions | Width 318x Height 889x Depth 308 mm |
Weight | 22kg |