Altec Lansing 9848 Professional Monitor

The Altec Lansing 9848 is a high-efficiency, two-way passive loudspeaker system developed during the 1970s as part of Altec’s renowned professional monitor series. Designed for critical listening environments such as recording studios, broadcast facilities, and live sound reinforcement, the 9848 exemplifies the classic horn-loaded loudspeaker philosophy that Altec pioneered. With its powerful dual-woofer configuration and precision multi-cell horn, this speaker delivers a dynamic, articulate sound that remains highly sought after by vintage audio enthusiasts and professional engineers alike.

Specifications

Feature	Specification
Model	Lansing 9848
Brand	Altec
Year of Production	1970s
Configuration	Two-way, passive crossover
Woofers	Dual 12-inch (2 x 12")
Horn Assembly	811B multi-cell horn with 806A compression driver
Power Handling	100W RMS (2 channels, stereo)
Impedance	8 ohms
Sensitivity	97 dB (1W/1m)
Frequency Response	50 Hz – 16 kHz (approximate)
Crossover Type	Passive, internal
Enclosure	Heavy-duty wood cabinet, ported design
Dimensions (HxWxD)	36" x 20" x 16" (approximate)
Weight	85 lbs per cabinet

Historical Context

The Altec Lansing 9848 was developed during a golden era of professional audio, when broadcast and recording studios demanded loudspeakers that could deliver high output, clarity, and reliability. As a member of Altec’s premium monitor lineup, the 9848 was engineered for accurate sound reproduction under demanding conditions. Its design leverages Altec’s decades of expertise in horn-loaded technology, dating back to the iconic "Voice of the Theatre" systems of the 1940s and 1950s.

The use of the 811B multi-cell horn paired with the 806A driver provides exceptional high-frequency dispersion and detail, making the 9848 ideal for studio monitoring where off-axis response and transient accuracy are critical. The dual 12-inch woofers offer strong midbass punch and dynamic headroom, ensuring the speaker can handle complex program material without compression.

These speakers were commonly found in radio stations, mastering suites, and film dubbing stages throughout the 1970s and into the 1980s. Their robust construction and high sensitivity made them well-suited for use with tube amplifiers, which were still prevalent at the time.

Sound Signature

The Altec 9848 delivers a bold, forward sound with a pronounced midrange presence—ideal for cutting through dense mixes. The horn-loaded tweeter provides crisp, detailed highs with excellent transient response, while the dual woofers contribute a tight, punchy bass response. While the system is efficient and dynamic, it does not extend deeply into the sub-bass region by modern standards, typically rolling off below 50 Hz.

Listeners often describe the sonic character as "immediate" and "engaging," with a sense of realism and presence that is difficult to replicate with many contemporary designs. The high sensitivity (97 dB) allows the speakers to achieve high sound pressure levels with relatively low amplifier power, making them a favorite among users of vintage and low-wattage tube amplifiers.

Maintenance and Restoration Tips

Due to their age, Altec Lansing 9848 speakers often require maintenance to restore optimal performance:

Foam Surrounds: The original foam surrounds on the 12-inch woofers are prone to drying out and disintegration after 40+ years. Re-foaming or replacing the woofers with modern equivalents (such as those from OEM or specialty rebuilders) is a common and recommended upgrade.

Crossover Components: Electrolytic capacitors in the passive crossover network may degrade over time, leading to reduced performance or even failure. Replacing these with modern, high-quality capacitors can significantly improve clarity and reliability.

Horn Driver Care: The 806A compression driver is sensitive to overdriving. Always ensure proper amplifier matching and avoid clipping. Inspect the diaphragm periodically for tears or misalignment—repair requires specialized service.

Cabinet Integrity: Check the wood cabinet for cracks, loose joints, or port blockages. The original ported design relies on proper internal volume and airflow; modifications can negatively impact bass response.

Grilles and Cosmetics: Original grilles may be missing or damaged. Reproduction or custom fabrication can help preserve both aesthetics and driver protection.

Collectibility and Market Value

The Altec Lansing 9848 holds a collectibility rating of 7 out of 10 among vintage audio enthusiasts. Its professional heritage, robust build, and distinctive sonic character contribute to steady demand in the used market. Pairs in good working condition with original components typically sell for $800 to $1,500, with higher prices commanded by fully restored units or those with rare finishes or provenance.

While not as ubiquitous as the Altec A7 "Voice of the Theatre," the 9848 occupies a respected niche among vintage studio monitor collectors and high-efficiency speaker aficionados. Its suitability for both music and film applications ensures continued relevance in dedicated listening rooms and retro studio setups.

Conclusion

The Altec Lansing 9848 stands as a testament to the engineering excellence of one of America’s most influential audio companies. Combining high efficiency, professional-grade components, and a commanding soundstage, it remains a compelling choice for those who appreciate the sonic character of vintage horn-loaded designs. With proper care and restoration, the 9848 can continue to deliver authoritative, engaging sound for decades to come.