Altec 414 (1970)

At 6.8kg and with a 314mm face, this 12-inch woofer packs serious magnetism into a compact frame.

Overview

The Altec 414 isn’t just another vintage woofer—it’s a design that balanced size, efficiency, and low-end reach in a way few drivers of its era managed. Released in 1970 by Altec Lansing, the 414 was built as a 30 cm cone type low frequency speaker unit, intended to deliver deep, blooming bass even when mounted in cabinets with relatively small internal volumes. That made it a practical choice for compact speaker systems without sacrificing the low-end authority expected from a 12-inch driver. It found its way into the Altec 844A speaker system, where its ability to handle crossover duties as high as 1.5kHz—sometimes even up to 2–3kHz—allowed companion midrange and tweeter drivers to operate within more forgiving frequency bands.

While often referred to simply as the "Altec 414," multiple variants exist, including the 414-8B, 414-8C, 414-16C, and others, differing primarily in impedance and possibly internal construction. The 8-ohm versions (-8B, -8C) are more commonly encountered today, though 16-ohm variants like the 414-16C are noted as increasingly sought after. The driver features a 76mm voice coil and a hefty 10,000 gauss magnetic flux density, contributing to its control and power handling. Its aluminum die-cast frame gives it a robust, industrial feel—this is a driver built to last, even if its outward appearance might be described by some owners as "rather scruffy."

Despite its age, the 414 remains relevant in vintage audio circles, not just as a relic but as a functional component. Great Plains Audio (GPA) now produces a new version of the 414-8B, signaling ongoing demand. Restorations are common, with enthusiasts bringing aging units back to life through reconing and magnet servicing. The fact that a driver from 1970 still commands attention—and price tags reflecting that demand—speaks volumes about its enduring engineering.

Specifications

Manufacturer	Altec Lansing
Model Rating Type	30 cm cone type woofer unit
Frequency characteristic	30 Hz to 4 kHz
Lowest resonance frequency	30Hz
Impedance	8 Ω (for -8B/-8C variants); 16Ω variants (e.g., -16C) also exist
Power Handling	50W (Allowable input)
Magnetic flux density	10,000 gauss
Recommended crossover frequency	1.5kHz
Output sound pressure level	98 dB (New JIS)
Voice Coil Diameter	76mm
External dimensions	Diameter 314 x Depth 150 mm
Weight	6.8kg
Free-air resonance (Fs) for 414-8B	25.6 Hz (reportedly)
DC resistance for 414-8B	8-ohm (reportedly)
Sensitivity	in the 96-98 dB/W/m range (according to available documentation)

Key Features

30cm Cone with High Upper Frequency Limit

Unlike many large woofers of its time that required low crossover points to avoid harshness, the Altec 414 was engineered to extend cleanly into the upper bass and lower midrange. Its frequency characteristic reaches up to 4 kHz, and owners report that it can be crossed over as high as 2–3 kHz in practice. This flexibility made it a valuable component in multi-way systems, reducing the burden on midrange drivers and simplifying crossover design.

Compact Cabinet Compatibility

Despite its 12-inch size, the 414 was designed to perform well in enclosures with limited internal volume. This was a significant advantage in home audio applications where bulky speaker cabinets were impractical. The combination of low resonance (30Hz nominal, 25.6Hz for the 414-8B variant) and high magnetic flux density allowed it to deliver deep, controlled bass without requiring a large sealed or ported box.

Aluminum Die-Cast Frame

The use of aluminum die-cast for the frame contributes to both rigidity and heat dissipation. It gives the driver a solid, precision-built feel and helps maintain alignment under high excursions. This construction choice reflects Altec’s focus on durability and performance consistency, especially important in professional and high-fidelity applications.

76mm Voice Coil with 10,000 Gauss Magnet

The large 76mm voice coil works in tandem with a powerful 10,000 gauss magnetic circuit to deliver strong motor force and thermal resilience. This setup supports the 50W power handling rating and contributes to the driver’s reportedly high efficiency, with sensitivity estimated between 96 and 98 dB/W/m. That efficiency makes it a good match for lower-powered tube amplifiers, a key consideration for many vintage system builders.

Collectibility & Value

Original pricing for the Altec 414 was ¥44,000 per unit at its 1970 release. In today’s market, used 414-8B drivers in alleged good condition have traded for $700 per pair, reflecting their status as desirable vintage components. The new production 414-8B from Great Plains Audio (GPA) carries a significantly higher price tag of $2,460 per pair, underscoring both the demand and the premium placed on reliability and authenticity. Restoration is a common practice, with technicians and hobbyists reconing and refurbishing original units, suggesting that while the driver is durable, age-related wear is expected. The 414-16C variant is noted as particularly sought after, though specific pricing data for it is not available.