Altec 9440A ([1975])

The Altec Lansing 9440A is an amplifier from the mid-1970s. It is not as well known today as the JBL 4310 or the Yamaha NS-10, but it found a place in professional broadcast studios, mastering facilities, and radio stations, where clarity, durability, and consistent performance mattered most. Altec Lansing, the maker, had been in professional audio since the 1940s.

Design and Construction

The 9440A is a two-way, bass-reflex loudspeaker system for near-field and mid-field monitoring. The cabinet is compact and trapezoidal, built from high-density particleboard, finished in textured black vinyl, with a black metal grille. The shape cuts down on parallel surfaces, which can cause internal resonances, and the cabinet design minimizes internal standing waves and external diffraction. That makes it a good fit for critical listening.

The low-frequency driver is a 12-inch (305 mm) Altec 515G with a cast aluminum frame, a large voice coil, and a treated paper cone. It is built for high power handling and low distortion. It delivers tight, articulate bass down to around 50 Hz, depending on room acoustics and placement.

For high frequencies, the 9440A uses the Altec 802B compression driver on a 90° x 40° constant-directivity horn. The 802B has a 1.75-inch throat and a titanium diaphragm. It is known for extended high-frequency response (up to 18 kHz) and exceptional transient response. Altec used it widely in its professional line arrays and studio monitors, and it built a reputation for clarity and durability under high SPL conditions.

The crossover sits inside the cabinet. It is a passive second-order design (12 dB/octave) set at approximately 1.6 kHz, with precision capacitors, inductors, and resistors typical of professional-grade parts from that era. It hands off between the woofer and the horn while preserving phase coherence and minimizing intermodulation distortion.

Performance Characteristics

Altec designed the 9440A for the demands of broadcast monitoring, where speech intelligibility and midrange accuracy are critical. Frequency response runs from approximately 50 Hz to 18 kHz. Sensitivity is around 98 dB (1W/1m), so it is highly efficient and works fine with moderate-powered amplifiers.

Midrange clarity is the standout quality. The 802B horn and the well-tuned crossover give a forward, detailed midrange, ideal for monitoring vocals, dialogue, and instruments in the critical 500 Hz to 4 kHz range. That made the 9440A a favorite in radio stations and voice-over studios, where understanding every word was essential.

The bass is solid for a 12-inch driver in a relatively compact enclosure, but it does not go as deep as modern studio monitors with powered subwoofers. It is tight and well-controlled, and it avoids the boominess that plagued many consumer-grade speakers of the era. The horn-loaded high-frequency section gives excellent dispersion and dynamic headroom, so the speaker handles high sound pressure levels without compression or distortion. That counted in broadcast work, where consistent output is needed over long periods.

Applications and Legacy

Altec marketed the 9440A mainly as a broadcast monitor, often used with larger systems like the 604E or 605A for full-range monitoring. It saw widespread use in AM/FM radio stations, television studios, and post-production facilities through the 1970s and into the early 1980s. The construction is rugged, and it worked daily under demanding conditions.

The 9440A never gained the cult following among audiophiles that some other Altec models did. One likely reason is its clinical, uncolored sound, which was designed for accuracy rather than warmth or euphonic coloration. Unlike the "smiley curve" response of many consumer speakers, it aims for neutrality, and some listeners may find that fatiguing over long sessions.

Today the 9440A is a vintage professional monitor, sought after by collectors, studio restorers, and engineers who want period-correct equipment for analog recording setups. It is not as common as the Altec 604 series, but examples still turn up on the used market. They often need reconing or driver refurbishment because of age-related wear.

Technical Specifications

Model: Altec Lansing 9440A
Type: Two-way passive studio monitor
Cabinet Design: Bass-reflex (ported), trapezoidal
Low-Frequency Driver: Altec 515G, 12-inch paper cone
High-Frequency Driver: Altec 802B, 1.75-inch compression driver with titanium diaphragm
Horn: 90° x 40° constant-directivity
Crossover Frequency: 1.6 kHz (second-order)
Frequency Response: approximately 50 Hz – 18 kHz (±3 dB)
Nominal Impedance: approximately 8 ohms
Sensitivity: approximately 98 dB (1W/1m)
Power Handling: approximately 150 watts continuous, 300 watts peak
Dimensions (HxWxD): approximately 24.5" x 14.5" x 12.75" (622 x 368 x 324 mm)
Weight: approximately 52 lbs (23.6 kg) per cabinet
Finish: Textured black vinyl
Grille: Black perforated steel with foam backing

Conclusion

The Altec Lansing 9440A stands as a testament to the high standards of American professional audio engineering in the 1970s. While it may not have achieved the same iconic status as some of Altec’s other models, it remains a capable and reliable monitor that served faithfully in countless broadcast and studio environments. For those restoring vintage gear or seeking the authentic sound of mid-century audio production, the 9440A offers a window into a time when durability, clarity, and precision were the hallmarks of professional equipment. Though passive and lacking the deep bass of modern designs, its strengths in midrange accuracy and high-SPL performance ensure it remains a respected piece of audio history.

eBay Listings

Altec 9440A vintage audio equipment - eBay listing photo 1

Altec 9440A Amplifier 800-Watt Professional Products Series

$1,280

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