Altec Lansing 34853 Compression Driver

Name: Altec 34853
Brand: Altec

The Altec Lansing 34853 is a vintage high-frequency compression driver produced during the mid-20th century, likely in the 1950s or 1960s. Though often associated with 1975 due to its continued use and availability, it belongs to Altec’s golden era of professional audio innovation. Designed for integration into high-efficiency horn-loaded systems, the 34853 was widely used in cinema sound, public address (PA) systems, and large venue installations. It played a key role in shaping the sonic character of Altec’s legendary "Voice of the Theatre" speaker systems.

Renowned for its robust construction and dynamic clarity, the 34853 features an alnico magnet and phenolic diaphragm, delivering a bright yet smooth high-frequency response with excellent projection and efficiency. Today, it remains a sought-after component among vintage audio enthusiasts, restorers, and horn speaker aficionados.

Specifications

Feature	Specification
Model	Altec Lansing 34853
Year of Production	Likely 1950s–1960s
Type	High-frequency compression driver
Impedance	16 ohms (nominal)
Sensitivity	~110–112 dB (1W/1m)
Power Handling	Not officially rated (system-dependent)
Magnet Type	Alnico
Diaphragm Material	Phenolic
Horn Design	Exponential (requires external horn throat)
Mounting	Standard 1.75" compression driver mount
Typical Applications	Cinema sound, PA systems, theatre audio

Historical Context

The Altec Lansing 34853 is part of Altec’s esteemed lineage of professional audio components developed during the post-war audio boom. Altec Lansing, formed from the merger of Altec Service Corporation and Lansing Manufacturing Company, became a dominant force in sound reinforcement and cinema audio throughout the 1950s and 1960s.

The 34853 was engineered to deliver high output and reliability in demanding environments. It was commonly paired with large-format exponential horns and multi-way enclosures, including systems like the A-7 and other "Voice of the Theatre" configurations. These systems became industry standards in movie theaters and live sound applications, prized for their dynamic range, clarity, and ability to fill large spaces without amplification distortion.

As a compression driver, the 34853 was not a standalone speaker but a critical component in high-efficiency horn systems. Its alnico magnet and phenolic diaphragm construction reflect the premium materials and craftsmanship typical of Altec’s professional-grade drivers of the era.

Sound Signature

The 34853 delivers a classic horn sound characterized by a clear, detailed midrange and extended highs. Its presentation is slightly forward, offering excellent vocal intelligibility and presence—ideal for speech and musical reproduction in large venues. The highs are smooth and articulate without being harsh or overly bright, a hallmark of well-designed vintage Altec drivers. When paired with a proper horn and crossover, the 34853 contributes to a dynamic, lifelike soundstage with impressive projection and efficiency.

Maintenance and Restoration Tips

Due to its age, the Altec 34853 may require maintenance to restore optimal performance:

Alnico Magnet Strength: Over time, alnico magnets can lose flux. If output seems weak, consider professional remagnetization using a magnet charger.
Diaphragm Inspection: Check the phenolic diaphragm for cracks, warping, or corrosion. Replacement diaphragms or reconing services are available from specialty vintage audio shops.
Voice Coil Clearance: Ensure the voice coil moves freely and is centered. Rubbing or scraping indicates misalignment or damage.
Horn Throat Fit: Verify compatibility with the horn throat. Use proper gaskets or sealing to prevent air leaks.
Mounting Hardware: Inspect screws and flange integrity. Replace worn or stripped hardware to ensure secure mounting.
Cleaning: Use compressed air and soft brushes to remove dust. Avoid liquids near the diaphragm or magnet gap.

For best results, test the driver with a low-power signal initially after restoration.

Collectibility and Market Value

The Altec Lansing 34853 holds a collectibility rating of 7/10 among vintage audio enthusiasts. While not as iconic as the 1501 or 285 series, it is valued for its role in professional audio history and compatibility with classic horn systems.

Market Value: $150–$400 per driver
Factors Affecting Value: Condition, tested functionality, original finish, and whether sold as a matched pair
Restoration Potential: High—many drivers can be rebuilt to original performance standards

Drivers that have been professionally serviced or tested with strong output command premium prices, especially in the vintage PA and cinema restoration communities.

Conclusion

The Altec Lansing 34853 stands as a testament to mid-century American audio engineering. Its combination of high efficiency, durable construction, and classic horn tonality makes it a prized component for restorations and vintage sound systems. Whether used in a period-correct theatre setup or integrated into a modern high-efficiency horn project, the 34853 continues to deliver the authoritative presence that defined an era of professional audio.