Altec Lansing 288D Compression Driver
The Altec Lansing 288D is a high-efficiency compression driver developed during the 1960s and produced through the 1970s. It was used in professional sound reinforcement and cinema audio systems, and it became a cornerstone of Altec's "Voice of the Theatre" line. It was known for clarity, dynamic response and high output, and it was built for use with multicellular horns in high-fidelity and public address work.
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 288D was commonly paired with Altec’s multicellular horns, such as the 802 and 811 models, to form high-efficiency loudspeaker systems. These went into movie theaters, broadcast studios and live sound rigs. The systems were often called "Voice of the Theatre" (VOTT), and they set a benchmark for sound clarity and projection before modern PA systems arrived.
The 288D was designed for reliability and high output from minimal amplifier power. That made it a good fit wherever efficiency and fidelity were critical. It was also used in recording studios and dubbing theaters, which built its reputation as a reference-grade driver. Vintage units are still sought after by audiophiles, restorers and classic audio enthusiasts.
Sound Signature
The 288D has a bright, articulate, dynamic high-frequency response with a strong midrange presence. Mated with a compatible horn and crossover, it produces a detailed and immersive soundstage. It is also very sensitive and has an extended response, so it can sound bright or even harsh with mismatched components or in acoustically reflective rooms. The system has to be put together carefully to get the most out of it.
Maintenance and Restoration Tips
Given its age, the Altec 288D may need maintenance to restore good 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 because of its historical significance, build quality and lasting 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 look for 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.
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