Altec 412B
Not much is documented about the Altec 412B. What the record shows comes mostly from period advertisements, where the model number appears alongside the Altec 415A in 1958 and 1959 issues of Audio (January 1958, p.85) and High-Fidelity. Those ads list a "Guaranteed Frequency Range: 30-14,000 cps" and a price of $63.00 for the 415A. No comparable spec or price is given for the 412B itself.
The 412B is listed in the context of Altec's "Biflex" speaker line. The ad copy in Audio (November 1959, p.67) describes Biflex speakers as "the leading high fidelity single voice coil" designs, which suggests the 412B was a full-range single-cone unit rather than a multi-driver system. Beyond those few clues, no schematic, crossover detail, impedance rating, or production year range has surfaced. Even the product type - speaker, driver, or perhaps a component in a commercial installation - is not clearly stated in any surviving source.
If you own a 412B and can provide measurements or photos, the archive would welcome the addition.
- Known context: Appears in 1958–1959 Altec Biflex advertisements
- Associated model: 415A (same ad page, $63.00, 30–14,000 Hz guaranteed range)
- No specifications, dimensions, or crossover data located
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