Electro Research Model320
¥ 98,500 (1 unit, around 1970 s?)
Commentary
A bookshelf type speaker system that employs a multi-vent tuning method.
Equipped with a 30 cm cone woofer for the low range, a 12 cm cone midrange for the middle range, a 6 cm cone tweeter for the high range, and a 3.6 cm cone super tweeter for the ultra high range.
These units use special coating for cone paper developed Shinkai to realize the sound quality unique to the all-cone type.
By measuring up to one coil in the network and using it, we guarantee reliable characteristics.
Three continuously variable level controls are mounted on the back.
The enclosure is designed with multi-vent ports to provide an ideal bass reflex effect by drilling an unspecified number of small holes in one part of the enclosure while measuring characteristics.
The exterior has a walnut wood finish and the front grill uses breathable foam plastic.
Model Rating
| Type | 4-Way, 4-Speaker, Bass Reflex System, Bookshelf Type |
| Units Used | For low band : 30 cm cone type For Medium Range : 12 cm cone type For high pass : 6 cm cone type For Super High Range : 3.6 cm cone type |
| Impedance | 8 Ω |
| Frequency characteristic | 30 Hz to 20 kHz ± 3 dB |
| fo | 42Hz |
| Output sound pressure level | 88dB/W |
| Max Input | 100W(Music Power) |
| Crossover frequency | 500 Hz, 3 kHz, 7 kHz |
| External dimensions | Width 400x Height 605x Depth 333 mm |
| Weight | 18kg |