From a ELECTRO-VOICE flyer/1977.
I don`t know a B Series II with a EV logo on the bass-mid driver, may be yours at a later time reconed from EV.
The 12" isn`t a woofer with voice-coil, it is a (passiv) low-frequency radiator
The tweeters are from PEERLES
Interface: B Series II
The Interface: B is up against some tough competition. But instead of putting our money in gadgets and gimmicks, we've concentrated an performance.
The B is nearly as efficient as Interface: C and D. It plays twice as loud as a typical acoustic Suspension speaker using exactly the saure power.
So you can have the wide dynamic range and effortless sound of a high¬powered amplifier without a high-powered price. It makes recorded music sound real. And that's what hi-fi is all about.
The Interface: B's vented, equalized design puts out honest bass all the way down to 26 Hz. And that kind of deep, low-distortion bass sounds really awesome.
The B also uses front and rear-mounted tweeters, for excep¬tional high frequency dispersion. And the tweeters are protected from burn-out by an exclusive electronic circuit.
Before you buy a speaker with a lot of jazzy "features", listen to the Interface: B. It has the best feature of all - the brilliance and clarity of "live" music.
Specifications
Frequency Response: 26-20000 Hz; ±3 dB from 30-18 000 Hz
Recommended Amplifier Power: 3.6 watts min. (for 90 dB SPL);
200 watts max. (for 107 dB SPL)
Impedance: 8 ohms, nominal
Drivers: 12" low-frequency radiator; 8" midrange/ woofer;
2-1/2" front-mounted tweeter with acoustic lens;
2-1/2" rear-mounted tweeter
Cabinet: walnut or oak veneer Size: h 74,5 cm x w 40,5 cm x d 26,5 cm
Michael-Otto