Altec Lansing Model 15 (1978)

The Altec Lansing Model 15 is a two-way loudspeaker system introduced in 1978 as part of Altec's "Santana" series. It was built to bring professional audio performance into the home. It has a 15-inch woofer and an 811B horn loaded with the 806A compression driver. The sound is dynamic, warm and highly efficient. It has a studio-monitor pedigree and a cabinet that suits a living room, and collectors still go looking for it.

Specifications

Feature	Specification
Model Name	Lansing Model 15
Brand	Altec
Production Years	1978–1983
Configuration	2-way, passive crossover
Woofer	15-inch paper cone with foam surround
Compression Driver	Altec 806A on 811B exponential horn
Crossover Frequency	~1.4 kHz
Impedance	8 ohms (nominal)
Sensitivity	96 dB (1W/1m)
Power Handling	100W RMS (2-channel stereo)
Frequency Response	45 Hz – 16 kHz (±3 dB)
Enclosure Type	Front-ported bass reflex, walnut veneer cabinet
Dimensions (H×W×D)	32" × 14.5" × 16" (81.3 × 36.8 × 40.6 cm)
Weight	68 lbs (30.8 kg) per cabinet

Historical Context

The Model 15 was developed when the lines between professional studio monitors and high-fidelity home speakers began to blur. It belongs to the Santana series, which also included the Model 12 and Model 17. Altec engineered it to give the accuracy and output of its theater and broadcast monitors in a cabinet suited to domestic use.

The Model 15 uses the 811B constant-directivity horn and the 806A titanium diaphragm compression driver. Both were widely used in recording studios and cinemas. The 15-inch low-frequency driver works with a front-firing bass reflex port. That gave deep, articulate bass, which was uncommon in home speakers of the era.

The pro-audio parts sit in a walnut cabinet with refined voicing. That made the Model 15 a favorite among serious listeners who wanted both performance and presence in the room. It is still a benchmark for high-sensitivity, horn-loaded loudspeakers in vintage audio circles.

Sound Signature

The Model 15 is known for its warm, dynamic, and highly efficient sound. Sensitivity is 96 dB, so it reaches high sound pressure levels on relatively low amplifier power. That makes it a good match for tube amplifiers and low-wattage SET designs.

Midrange: Rich and forward, with exceptional clarity and presence—ideal for vocals and acoustic instruments.
Highs: Smooth and detailed, thanks to the 806A driver’s controlled dispersion and low distortion.
Bass: Tight and impactful for a ported 15-inch design, with good extension down to 45 Hz.
Overall Character: Musically engaging with a lively, open presentation that remains balanced across genres.

Maintenance and Restoration Tips

Because of their age, many Model 15 speakers need some maintenance to perform at their best. Here are the common issues and the recommended care:

1. Woofer Foam Surrounds

The original foam surrounds on the 15-inch woofers are prone to drying, cracking, and disintegration after 30+ years.
Solution: Re-foam kits are widely available. Professional reconing or DIY refoaming is strongly recommended to restore bass response and prevent damage to the voice coil.

2. Crossover Components

The passive crossover uses paper and electrolytic capacitors that may degrade over time, leading to muffled highs or imbalance.
Solution: Recapping the crossover with modern film capacitors improves reliability and sonic clarity. Match original values and voltage ratings.

3. Compression Driver (806A)

The 806A driver is robust but can fail if overdriven or exposed to DC offset.
Inspect the phase plug and diaphragm for tears or warping.
Tip: Avoid clipping and use a high-pass filter if pairing with high-power amplifiers.

4. Cabinet and Grille

The walnut veneer is durable but may show wear. Clean with a wood-safe polish; avoid silicone-based products.
Original grilles often have frayed cloth—replacement speaker grille fabric can be stretched and stapled for a refreshed look.

5. General Advice

Bi-wiring is possible but not required. Use heavy-gauge speaker cable with secure connections.
Place on sturdy stands or shelves with adequate rear clearance for the bass reflex port.
Break in restored drivers with low-level playback over 24–48 hours.

Collectibility and Market Value

The Altec Lansing Model 15 has a collectibility rating of 7/10. It appeals to vintage audio enthusiasts, horn speaker fans and collectors of American-made hi-fi gear. Fully restored pairs in original condition command premium prices.

Market Value: $800 – $1,500 per pair, depending on condition, originality, and restoration quality.
High-Value Traits: Original drivers, unmodified crossovers, clean cabinets, and provenance (e.g., studio use history).

While not as rare as some boutique vintage speakers, the Model 15’s blend of performance, heritage, and iconic design ensures lasting demand in the secondary market.

Conclusion

The Model 15 bridges professional monitoring and home fidelity, and its high efficiency keeps it competitive even by modern standards. With proper care and restoration, it can keep playing for decades.

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