Clockwise
from left. Interface: 1, 2, 3, B Series II, D,C, A Series II .
Interface by E-V, Four years ahead of the speaker industry.
Again.
We made the first computer-designed Thiele speaker.
Now we're into the second generation.
When A.N. Thiele speaks, everybody listens.
Electro-Voice listened first.
That's why we're a full four-year generation ahead of everyone else in the production of Thiele-theory, computer designed speakers.
Back in 1973, E-V brought out the original Interface:A. It was the world's first vented speaker designed by computer, using the technology developed by the Australian scientist, A.N. Thiele.
This was the first vented speaker that combined the high efficiency of earlier bass reflex types with even greater bass out put than the power-hungry acoustic suspension designs. And it was more accurate than either.
Now, four years later, E-V has come out with its highly refined second generation of Thiele-theory, computer designed speakers while everyone else is bragging about their first generation.
The new Interface line--7 speakers strong--is at least four times as efficient as a typical acoustic suspension speaker. That gives your amplifier the equivalent of four times the power, whether you have 15 watts or 60. Now you can listen to music at truly realistic levels- without audible distortion.
And with greater accuracy than you have ever experienced.
And when it comes to bass, Interface speakers set new standards. Our Interface:D system is only 3 dB down at 28 Hz! That's bass you can feel as well as hear.
Fact is, our new Interface speakers really are a generation ahead, and we think you'll agree when you hear them yourself. For the complete story, write for our free color brochure. Then you'll be four years ahead, too.
E-V Interface.
Electro-Voice-- a gulton company 600 Cecil St., Buchanan, Michigan, 49107, USA.
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ESS speakers with Heil technology