Altec Lansing 288D Compression Driver

The Altec Lansing 288D is a legendary high-efficiency compression driver developed during the 1960s and produced through the 1970s. Revered for its role in professional sound reinforcement and cinema audio systems, the 288D became a cornerstone of Altec's "Voice of the Theatre" legacy. Known for its clarity, dynamic response, and robust output, this driver was engineered for use with multicellular horns in high-fidelity and public address applications.

Specifications

Parameter	Specification
Manufacturer	Altec Lansing
Model	288D
Type	Compression Driver
Frequency Response	1.5 kHz – 16 kHz (typical with horn)
Power Handling	5W – 50W (system-dependent)
Impedance	16 ohms
Sensitivity	110 – 112 dB (1W/1m)
Diaphragm	2-inch throat, aluminum or phenolic variants
Voice Coil	Not specified (high-temp materials typical)
Horn Compatibility	Multicellular horns (e.g., 802, 811)
Intended Use	Professional audio, cinema, studio monitoring
Weight	~2.5 lbs (1.13 kg)

Historical Context

The Altec Lansing 288D was a key component in the evolution of professional audio during the mid-20th century. It was commonly paired with Altec’s iconic multicellular horns, such as the 802 and 811 models, to form high-efficiency loudspeaker systems used in movie theaters, broadcast studios, and live sound applications. These systems, often referred to as "Voice of the Theatre" (VOTT), set a benchmark for sound clarity and projection before the rise of modern PA systems.

The 288D's design emphasized reliability and high output with minimal amplifier power, making it ideal for environments where efficiency and fidelity were critical. Its use in recording studios and dubbing theaters further cemented its reputation as a reference-grade driver. Even today, vintage 288D units are sought after by audiophiles, restorers, and enthusiasts of classic audio equipment.

Sound Signature

The 288D delivers a bright, articulate, and dynamic high-frequency response with a strong midrange presence. When properly mated with a compatible horn and crossover, it produces a detailed and immersive soundstage. However, due to its high sensitivity and extended response, the driver can sound bright or even harsh if used with mismatched components or in acoustically reflective environments. Careful system integration is essential to harness its full potential.

Maintenance and Restoration Tips

Given its age, the Altec 288D may require maintenance to restore optimal performance:

Diaphragm Inspection: Check for tears, warping, or corrosion. Aluminum diaphragms are prone to fatigue; phenolic versions are often more durable. Replacement diaphragms are available from specialty audio restoration suppliers.
Terminal Care: Clean oxidation from input terminals using electrical contact cleaner. Ensure tight connections to prevent signal loss.
Magnet Strength: Over decades, the magnet may weaken. If sensitivity drops significantly, remagnetization by a professional may be necessary.
Horn Matching: Always use with a compatible multicellular horn. The 802A/B or 811A horns are ideal pairings that balance dispersion and frequency response.
Crossover Considerations: Use with a properly designed passive crossover (typically 1.2–1.6 kHz) to protect the driver and ensure seamless integration with low-frequency units.

Collectibility and Market Value

The Altec 288D scores an 8/10 on the collectibility scale due to its historical significance, build quality, and enduring reputation. Units in original condition with working diaphragms command higher prices. As of recent market trends, individual drivers sell for $200–$600, depending on condition, diaphragm type, and provenance.

Collectors often seek out phenolic-diaphragm variants for their perceived durability and sonic characteristics. Complete systems or matched pairs are especially valuable for restoration projects.

Conclusion

The Altec Lansing 288D remains a symbol of golden-era audio engineering. Its combination of efficiency, clarity, and professional-grade construction continues to influence modern loudspeaker design. Whether used in a restored VOTT system or integrated into a high-end vintage setup, the 288D delivers a listening experience that few modern drivers can replicate. For collectors and audiophiles alike, it stands as a testament to Altec’s enduring legacy in professional audio.