Altec Lansing 9846A 2-Way Studio Monitor

The Altec Lansing 9846A is a classic professional studio monitor from the 1970s, designed for accurate sound reproduction in broadcast and recording environments. As part of Altec’s renowned line of studio monitors, the 9846A exemplifies the American approach to horn-loaded loudspeaker design—prioritizing efficiency, clarity, and durability. With its powerful 12-inch woofer and high-efficiency compression driver, this speaker became a staple in professional audio studios and remains a sought-after vintage piece among audiophiles and collectors.

Specifications

Feature	Specification
Model	9846A
Brand	Altec Lansing
Year of Production	1970s
Type	2-way studio monitor
Power Handling	50–75W RMS, 2 channels
Impedance	8 ohms
Sensitivity	96 dB (1W/1m)
Crossover Frequency	800 Hz
Woofer	12-inch paper cone with foam surround
Compression Driver	Altec 806A with 1.75-inch diaphragm
Horn	Altec 811B exponential horn
Cabinet	Durable plywood with textured black finish
Dimensions (H×W×D)	26" × 15" × 12" (approx.)
Weight	55 lbs per cabinet

Historical Context

The Altec Lansing 9846A was developed during a golden era of analog audio engineering, when broadcast and recording studios demanded monitors with flat frequency response, high output capability, and long-term reliability. As a member of Altec’s professional monitor series, the 9846A was engineered for critical listening applications, offering a transparent and dynamic sound signature ideal for mixing and mastering.

Its design leverages Altec’s expertise in horn-loaded technology, which increases efficiency and reduces distortion in the midrange and high frequencies. The combination of the 806A compression driver and the 811B horn delivers exceptional clarity and projection, while the 12-inch woofer provides tight, punchy bass response. This configuration made the 9846A a favorite in radio stations, TV studios, and independent recording facilities across North America.

The 9846A represents the culmination of decades of Altec’s innovation in professional audio, tracing its lineage back to the legendary 604 Duplex. While not as ubiquitous as the 604, the 9846A offered a more modern, compact alternative with improved power handling and frequency extension.

Sound Signature

The 9846A delivers a forward, energetic sound with excellent transient response and dynamic punch. Key characteristics include:

Midrange: Clear and articulate, with the horn design enhancing vocal presence and instrument definition.
Highs: Crisp and detailed without harshness, thanks to the smooth dispersion of the 811B horn.
Bass: Tight and responsive, with the 12-inch woofer providing solid low-end extension for its era.
Efficiency: High sensitivity (96 dB) allows the speakers to perform well even with modest amplifier power.

This makes the 9846A particularly well-suited for monitoring rock, jazz, and broadcast content where clarity and impact are essential.

Maintenance and Restoration Tips

Due to their age, Altec 9846A speakers often require maintenance to restore optimal performance. Common issues and recommended actions include:

Foam Surround Degradation: The original foam surrounds on the 12-inch woofers commonly deteriorate over time. Replacing them with modern rubber or foam kits (available from specialty vendors) is essential for restoring bass response and preventing damage.
Crossover Components: Electrolytic capacitors in the passive crossover can dry out or fail. Replacing these with modern film capacitors improves reliability and sonic performance.
Horn Diaphragm Inspection: Check the 806A driver’s titanium diaphragm for tears or warping. Re-coning or replacing the driver may be necessary if damage is found.
Cabinet Care: Clean the textured finish with a mild detergent and soft cloth. Avoid harsh chemicals that can damage the surface.
Grilles and Hardware: Original grilles may be missing or damaged. Reproduction grilles and mounting hardware are available from vintage audio suppliers.

Regular inspection and proactive restoration ensure the 9846A continues to deliver its legendary sound for years to come.

Market Value and Collectibility

The Altec Lansing 9846A holds steady appeal in the vintage audio market:

Market Value: $800–$1,500 per pair, depending on condition, originality, and completeness.
Collectibility Rating: 7/10 – While not as iconic as the 604, the 9846A is respected for its studio heritage and sonic performance. Original, unrestored pairs in good condition command premium prices.

Enthusiasts value the 9846A for its authentic vintage studio sound, build quality, and historical significance in professional audio. Whether used as active monitors with modern amplification or restored for classic setups, the 9846A remains a compelling choice for those who appreciate American audio engineering at its peak.