Electro-Voice Interface:DII
¥ 350,000 (1 unit, around 1979)
Commentary
Interface : A top-of-the-line speaker system of the Interface Series, an improved version of D.
A 30 cm cone type woofer is installed in the low range.
This unit is housed in the bottom of an enclosure designed based on the "optimal phase inversion" theory.
The mid-range is equipped with a 16 cm cone mid-range, Bent Mid-range.
This unit is constructed by applying the "interface type optimum phase inversion system" of the woofer division, and expands the low-frequency range. In addition, the efficiency is improved by using the huge magnetic circuit equivalent to the woofer. This improves the quality of the mid-range with the crossover frequency which is one octave lower than the usual three way system.
A radial horn type tweeter that maintains a radiation angle of more than 110 degrees at 16 kHz is installed in the high frequency range.
An electronic protection circuit is added to this unit.
Interface : The DII can be bi-amped with 350 hz crossover.
SEQ equalizer is included.
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Model Rating
| Method | 3-way, 3-speaker floor type |
| Unit | For low band : 30 cm cone type For Medium Range : 16 cm cone type For High Frequency : Horn Type |
| Frequency characteristic | 23 Hz to 20 kHz 28 Hz to 18 kHz ± 4 db |
| Output sound pressure level | 97dB/W/m |
| Impedance | 8 Ω |
| Maximum allowable input | 50W (long average) 500W (peak) |
| Crossover frequency | 40 Hz (acoustic), 350 Hz, 3 kHz |
| External dimensions | Width 552x Height 813x Depth 394 mm |
| Weight | 51.8kg |
| Attachment | SEQ equalizer |