Altec Lansing 290E (1968)
At 9.5kg and sealed against the elements, this driver was built to shout across stadiums and survive the decades.
Overview
The Altec Lansing 290E isn’t the kind of driver you’d tuck into a living room bookshelf. From the moment you heft its 9.5kg mass, it’s clear this was engineered for duty, not decor. Released in 1968, it’s a large-format high-frequency compression driver—sometimes referred to as a "Giant Voice" or large format paging driver—designed for applications where clarity at volume was non-negotiable. Its primary role? High-power voice announcement and paging systems, the kind that needed to cut through ambient noise in industrial, public, or even governmental installations.
With a frequency range spanning 300 Hz to 8 kHz, the 290E wasn’t chasing ultrasonic extension, but rather the critical midrange and upper-mid presence where human speech dominates. Paired with horns like the 311-90, 311-60, or the 239A Multi-seller, it was capable of achieving tightly controlled directional patterns—essential for intelligibility in large or reverberant spaces. The 7.1cm voice coil and 1.4" exit size point to a design optimized for power handling and efficient coupling to large horn throats, not delicate musical nuance.
Its 100W power rating (at 300 Hz or above) and 116dB/W/m sensitivity reveal the real story: this is a device built to move air and project sound over distance. The 4 Ω impedance makes it compatible with high-current professional amplifiers of the era, and the phenolic diaphragm suggests a focus on rigidity and durability under high acoustic stress. While not a studio monitor component, its engineering reflects Altec Lansing’s deep understanding of high-efficiency transduction in demanding environments.
Specifications
| Manufacturer | Altec Lansing |
| Type | Driver unit |
| Frequency characteristic | 300 Hz to 8 kHz |
| Impedance | 4 Ω |
| Allowable input | 100W (300 Hz or more) |
| Output sound pressure level | 116dB/W/m |
| Applicable Horn | 311-90, 311-60, 239A Multi-seller horn |
| Voice coil diameter | 7.1cm |
| Exit size | 1.4" |
| Diaphragm material | Phenolic |
| External dimensions | Diameter 165x Depth 180 mm |
| Weight | 9.5kg |
Key Features
Waterproof Sealed Structure
The 290E is built as a waterproof type with a completely sealed enclosure, a rare and telling feature for a compression driver. This wasn’t meant for climate-controlled auditoriums. It was designed to endure outdoor exposure, high humidity, or industrial environments where dust and moisture would compromise lesser units. That seal speaks volumes about its intended deployment—permanent outdoor PA systems, transportation hubs, or military-grade installations where reliability trumped aesthetics.
Phenolic Diaphragm
The use of phenolic material for the diaphragm is a deliberate choice for durability and stiffness. Unlike more resonant or flexible materials, phenolic resists deformation under high acoustic pressure, maintaining linearity during sustained high-volume operation. This contributes to consistent voice intelligibility over time, though it likely comes at the cost of some high-frequency smoothness. It’s a trade-off favoring function: clarity in emergency announcements or public address, not audiophile-grade timbre.
Directional Pattern Optimization
When mated with a dedicated throat and compatible horns like the 311-90 or 239A Multi-seller, the 290E achieves what Altec called “ideal directional pattern” sound pressure distribution. This means engineers could predict and control beamwidth and dispersion, essential for zoning sound in large venues or avoiding feedback in complex acoustic environments. The 1.4" exit size and large voice coil work in concert to load the horn efficiently, minimizing distortion at high SPLs.
Historical Context
Though the 290E itself isn’t named in the Japan World Exposition deployment, the use of the 1803B driver in a major public installation underscores Altec Lansing’s role in large-scale audio systems of the late 1960s and 1970s. The 290E fits squarely within that era of high-power, high-reliability PA design. Its application extended beyond public address: documentation confirms use in specialized government systems, including the Doppler Acoustic Vortex Sensing System and the NOAA Mark VII Acoustic Echo Sounder. These roles—where sound projection and durability were paramount—highlight the 290E’s engineering pedigree in non-conventional audio applications, far removed from music reproduction.
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