Altec Lansing 1005B Horn

The Altec Lansing 1005B is a passive multicellular exponential horn renowned for its use in professional audio, cinema sound systems, and high-fidelity home audio setups during the mid-20th century. As a key component in many of Altec's legendary speaker systems, the 1005B exemplifies the engineering excellence of the company's Golden Age. Designed to be paired with high-quality compression drivers such as the Altec 288 or 290 series, this horn delivers high efficiency and dynamic sound reproduction with precise dispersion control.

Specifications

Feature	Specification
Model	1005B
Type	Passive multicellular exponential horn
Horn Material	Cast aluminum
Design	Exponential, multicellular
Compatible Drivers	Altec 288, 290 series and equivalents
Power Handling	N/A (depends on driver used)
Impedance	N/A (depends on driver used)
Sensitivity	High (driver-dependent)
Frequency Response	Varies with driver and crossover
Intended Use	Professional audio, theater, high-end home audio
Weight	Heavy (exact weight varies by configuration)
Dimensions	Large; approximately 24" x 18" x 12" (varies)

Historical Context

The Altec Lansing 1005B horn was developed during the 1950s and remained in production through the 1960s, representing a pinnacle of horn loudspeaker design from Altec's most influential era. It was frequently used in conjunction with Altec's 288B or 290B drivers to form high-efficiency midrange or high-frequency sections in professional sound reinforcement and cinema systems.

As part of the broader "Voice of the Theater" (VOTT) legacy, the 1005B contributed to the sonic character of many classic Altec systems that became benchmarks in audio engineering. Its multicellular throat design helped control off-axis dispersion, reducing reflections and improving clarity in large venues. This made it a favorite in movie theaters, broadcast studios, and touring sound applications before the rise of modern line arrays.

Beyond professional use, the 1005B found a second life in high-end home audio systems, where audiophiles prized its dynamic punch, transparency, and ability to project sound with minimal amplifier power. Its association with Altec's reputation for durability and sonic excellence has cemented its status as a collectible vintage audio component.

Sound Signature

The 1005B horn delivers a sound signature typical of well-designed vintage multicellular horns: efficient, dynamic, and highly detailed. When paired with a quality driver and properly integrated into a crossover network, it offers excellent transient response and vocal clarity. The sound is often described as lively, forward, and engaging, with strong projection and presence.

However, the final sonic character is heavily dependent on the compression driver used, the crossover design, and the enclosure or baffle integration. Poor driver matching or outdated crossovers can result in harshness or imbalance, particularly in the upper midrange and treble.

Maintenance and Usage Tips

Owning and restoring Altec 1005B horns requires attention to detail and an understanding of vintage audio systems:

Inspect for Damage: Check the cast aluminum body for cracks, corrosion, or warping, especially around the driver mounting flange.
Gaskets and Seals: Original gaskets may have degraded. Replace with modern equivalents to ensure an airtight seal between the horn and driver.
Driver Compatibility: Use period-correct drivers like the Altec 288B or 290B for authenticity, or consider modern equivalents from companies like JBL or compression driver specialists.
Crossover Updates: Many original crossovers use outdated components. Consider rebuilding with modern capacitors and inductors for improved reliability and performance.
Mounting Considerations: The horn is heavy and bulky. Ensure secure mounting in cabinets or arrays, especially in portable applications.
Restoration: Light corrosion can often be cleaned with aluminum polish. Avoid aggressive sanding or painting, which can affect performance and collectibility.

Collectibility and Market Value

The Altec 1005B horn is highly sought after by vintage audio enthusiasts, professional restorers, and homebrew speaker builders. Its collectibility is rated 8/10, driven by its historical significance, build quality, and role in classic audio systems.

Market Value: $300–$800 per horn, depending on condition, originality, and whether it includes a matching driver.
Complete Sets: Horns sold with original Altec drivers and mounting hardware command premium prices.
Restoration Potential: Even non-working units can be valuable for parts or restoration projects.

Due to its professional heritage and enduring performance, the 1005B remains a cornerstone of vintage horn loudspeaker design and a prized component in any classic audio collection.