Altec Lansing 1005B Horn
The Altec Lansing 1005B is a passive multicellular exponential horn. It was used in professional audio, cinema sound systems, and high-fidelity home audio setups during the mid-20th century. It shows up in many of Altec's speaker systems from the company's Golden Age. It was designed to pair with high-quality compression drivers such as the Altec 288 or 290 series, and it gives high efficiency, dynamic sound, and 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
Altec developed the 1005B horn during the 1950s, and it stayed in production through the 1960s. It was often used with Altec's 288B or 290B drivers to make high-efficiency midrange or high-frequency sections in professional sound reinforcement and cinema systems.
The 1005B belongs to the broader "Voice of the Theater" (VOTT) family and contributed to the sound of many classic Altec systems that became benchmarks in audio engineering. Its multicellular throat design helped control off-axis dispersion, which reduced reflections and improved clarity in large venues. That made it a favorite in movie theaters, broadcast studios, and touring sound applications before modern line arrays arrived.
Outside professional work, the 1005B found a second life in high-end home audio systems. Audiophiles prized its dynamic punch, its transparency, and its ability to project sound with minimal amplifier power. Altec's reputation for durability and sonic quality has made it a collectible vintage audio component.
Sound Signature
The 1005B has the sound typical of a well-designed vintage multicellular horn: efficient, dynamic, and highly detailed. 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.
The final sound depends heavily on the compression driver, the crossover design, and how the horn is mounted in the enclosure or baffle. Poor driver matching or outdated crossovers can make it harsh or unbalanced, particularly in the upper midrange and treble.
Maintenance and Usage Tips
Owning and restoring Altec 1005B horns takes 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
Vintage audio enthusiasts, professional restorers, and homebrew speaker builders all go after the Altec 1005B horn. Its collectibility is rated 8/10, based on 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.
The 1005B comes from a professional lineage and is still a prized component in classic audio collections.
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