Altec 402A

Name: Altec 402A
Brand: Altec

At 10–11 ohms DCR, this 8-inch driver hums with the quiet confidence of vintage alnico iron

Overview

The Altec 402A isn’t a showpiece with chrome trim or exotic wood—just serious, no-nonsense engineering packed into a utilitarian steel frame. Marketed ambiguously as either a woofer or a full-range driver depending on the source, it occupies a curious niche in Altec’s mid-century lineup. Owners report it as a high-efficiency, wideband design, suggesting it was built to move air without demanding high power, a trait prized in the tube amplifier era. While its exact production span remains undocumented, a verified pair surfaced with a 1959 date stamp, anchoring it firmly in the late 1950s. Whether pressed into duty as a low-end anchor or a midrange workhorse, the 402A was clearly engineered for performance over presentation.

Despite its modest appearance, the 402A carries the DNA of Altec’s pro-audio heritage. Its construction—paper cone, cloth accordion surround, and heavy stamped steel basket—speaks to a time when durability and serviceability mattered more than mass production. It wasn’t meant to vanish into the furniture; it was meant to be heard, maintained, and relied upon. The lack of official frequency response, sensitivity, or power handling figures in surviving documentation doesn’t diminish its reputation—owners consistently describe the sound as articulate, particularly in the midrange, with a liveliness that modern ferrite drivers often struggle to replicate.

Specifications

Manufacturer	Altec
Driver size	8-inch
Frame material	Heavy stamped steel
Magnet type	Alnico
Magnet structure	Distinctive slanted box type with one side missing
Cone material	Paper
Surround material	Cloth accordion edge
Impedance	16 ohm
DC resistance (DCR)	10–11 Ohms

Key Features

High Efficiency, Wideband Design

Sources describe the 402A as a high-efficiency, wideband driver, a rare combination for an 8-inch unit of its era. This suggests it was engineered to cover a broad frequency range without excessive power input, making it a natural match for low-wattage tube amplifiers. The result, according to owners, is a speaker that delivers an articulate midrange and responsive dynamics—qualities that contribute to its enduring appeal among vintage audio enthusiasts.

Distinctive Slanted Box Magnet Structure

The magnet assembly is one of the 402A’s most visually striking features: a cylindrical alnico magnet housed in a slanted box structure with one side left open. This unusual design likely served both thermal and magnetic efficiency purposes, allowing heat to dissipate while maintaining a focused magnetic field. It’s a hallmark of Altec’s pragmatic innovation—form following function with a dash of industrial flair.

Cloth Accordion Edge Surround

Equipped with a treated cloth accordion edge surround, the 402A benefits from a suspension system known for its longevity and consistent performance over time. Unlike foam or rubber surrounds that degrade, cloth edges—when kept in stable environments—can remain supple for decades. This contributes to the driver’s reputation for reliability and is a key reason why working examples still surface in good condition.

Heavy Stamped Steel Frame

The heavy stamped steel frame provides a rigid foundation, minimizing resonance and ensuring the cone and voice coil operate in precise alignment. While heavier than cast aluminum baskets, the steel construction was cost-effective and robust, ideal for both consumer and professional applications. It’s a no-frills component that underscores the 402A’s workhorse character.

Historical Context

The 402A found a home in at least two Altec-designed bookshelf systems: the Lido and the Catalina. In the Catalina setup, it served as the woofer, paired with the 755B high-frequency driver. The crossover was minimal—just an inductor to roll off the highs—suggesting the 402A was trusted to handle a significant portion of the audio spectrum with minimal assistance. This simple integration speaks to its design confidence and Altec’s philosophy of elegant, effective engineering.

Collectibility & Value

Documented collector data is sparse, but anecdotal reports suggest the 402A remains a sleeper favorite. One verified pair was listed as dating from 1959, offering a rare chronological anchor. Owners consistently praise its sound, with descriptions like “they sound really good” and “articulate midrange” recurring across listings. While not as celebrated as the 416B or 417A, the 402A’s combination of alnico magnet, high efficiency, and solid build ensures it holds quiet respect among those who’ve heard it. No current market prices or common failure modes are documented, but the cloth surround and paper cone suggest climate stability is key to long-term preservation.