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UPDATE 08/28/2014 price dropped by $120 for quick sale!!!

For your consideration is one very rare survivor, an Altec Lansing 415a Biflex full range driver.

From product brochure: A massive 15" speaker that will provide full bass and wide range high fidelity reproduction at a modest price. The new 415a is the outstanding example of the amazing performance that has been made possible wit the exclusive Altec BIFLEX principle of multiple concentric compliances. Guaranteed for a range of 30 to 13,000 cycles, the 415a is years ahead in performance. MSRP in 1953 = $60.00

1954 brochure:
http://www.technicalaudio.com/pdf/Duplex_Speakers_related_to_Altec_604/604_1954_604C_Duplex_Speaker.pdf Speakers... The quality of a loudspeaker is determined by its frequency response, its efficiency and its lack of distortion... by its ability to reproduce accurately in sounds the electrical energy presented to it by the amplifier. The unsurpassed performance of Altec Lansing speakers is the direct result of years of experience and research in one of the world's most comprehensive acoustical laboratories... plus the matchless perfection of precision engineering and craftsmanship.

"biflex" speakers: Biflex single-cone speakers are a unique development of the famous Altec acoustic laboratories. Radically new in design concept, they efficiently reproduce a smooth frequency range never before achieved in any single cone speaker, thanks to Altec's exclusive multiple concentric compliance design. Like all Altec speaker, the new Biflex units have frequency ranges fully guaranteed by Altec Lansing Corporation.

415A 15": The 415 is a 15" speaker which provides full bass and wide range frequency response at a moderate price. Massive in construction, the 415 demonstrates the exciting performance that is possible using Altec's multiple concentric compliance principle. Guaranteed for a range of 30-14,000 cycles, the 415 is the finest speaker available in its price class. Price in 1957= $63.00 (each bare driver) $63 in 1957, considering inflation is equal to $530.65!

Item Details:

Marking on basket casting: S1, 602 830

Marking on inside of cone: 20681

Marking on magnet cover: Altec Lansing Corporation, 415 A Biflex, Impedance 8 Ohms, Made in USA, Pat. Pending.

Web, voice coil, cone, surround and mounting spacer-cork are all original equipment, as produced back in 1954

-The largest diameter cone had three small pinholes (two at 1/16" and one is the shape of a small index fingernail) which were repaired by a very experienced professional (he used rubber cement and black tissue paper).

-Outermost baffle surround had three small punctures (approx 3/8" diameter) which have also been repaired in the same fashion, surround doping is still tacky and flexible.

-There was a crack along one radial ridge of outermost baffle, approximately 4" long. It was repaired at the same time as one of the 3/8" punctures.

Fluke Voltmeter shows unpowered resistance at 5.2 ohms

-FREE Shipping to the Continental USA!

Feel free to ask any questions. I will answer them as promptly as possible.

LOOK AT MY OTHER AUCTIONS! I recently stumbled upon a large amount of industrial automation equipment, electric motors, and packaging equipment.

Winning bidder will pay ZERO for shipping to the continental United States. Delivery to a USPS P.O. box will incur an additional fee of $10.

Attention International and non-continental USA buyers: Shipping will incur a $25 handling fee. ALL VAT Taxes, customs duties and other international tariffs are the responsibility of the buyer, as is the actual shipping cost. Local Pickup is always available. Expedited shipping is available (you only have to pay the difference). Contact me to organize a local pickup, or for expedited shipping. I strive to make my listings as bluntly honest and let the images represent the item as if it were in front of you. I have never had an issue with an eBay auction, and I am confident I never will. Rest assured, this will be an incredibly smooth and simple transaction.

I will be providing a 14-day no-questions-asked return policy. You will simply need to pay for return shipping.

Happy Bidding!