Altec lansing-1506 (1975)

Name: Altec lansing-1506
Brand: Altec

Altec Lansing 1506 Compression Driver & Horn System

The Altec Lansing 1506 is a professional-grade high-frequency driver and horn assembly that was a workhorse in commercial sound reinforcement, cinema audio systems, and large venue public address installations throughout the 1970s and early 80s. This thing isn't some delicate studio flower—it's a tool built to throw sound across a crowded auditorium and make sure every last word of the dialogue or announcement was heard, crystal clear. It embodies Altec’s no-nonsense philosophy of high-efficiency, horn-loaded design, prioritizing brute-force projection and reliability over domestic niceties. If you find a pair, you're holding a piece of the infrastructure that made public spaces sound good before digital processing took over.

Specifications

Model	Lansing 1506
Type	Compression Driver + Multicellular Horn
Intended Use	Professional Audio / Theater / PA
Power Handling	30 Watts RMS
Impedance	16 Ohms
Sensitivity	Approx. 112 dB (1W/1m)
Frequency Response	500 Hz – 15,000 Hz
Horn Material	Molded phenolic resin
Driver Diaphragm	2-inch aluminum
Mounting	Bolt-on, 2-bolt pattern
Dimensions (Horn)	Approx. 12" x 12" x 9" (varies by flare)
Weight	Approximately 9 lbs

Note: Specifications compiled from period installation manuals and cross-referenced with similar models like the 802-8G driver.

Historical Context

Altec Lansing was the undisputed king of professional audio throughout the mid-20th century. While everyone knows the "Voice of the Theatre" cabinets, the real magic was in the modular components like the 1506 that system integrators could mix and match. This unit wasn't a standalone product you'd buy off a shelf; it was part of the guts of a larger system, typically bolted onto a low-frequency enclosure and fed by a passive crossover. Its natural habitat was the projection booth of a cinema or the rafters of a train station, where its job was to deliver intelligibility above all else.

The multicellular horn design is the key here—it wasn't just a megaphone. It carefully controlled dispersion to evenly cover those wide, fan-shaped auditoriums without beaming or creating nasty hot spots. This was critical technology for making sure the back row heard as well as the front row. Finding a 1506 today usually means it was salvaged from a theater being converted into condos or a church upgrading its sound. It’s a survivor of a more analog, component-driven era of sound engineering.

Sound Signature

Let's be honest: you don't put a horn like this in your living room for silky-smooth jazz. The Altec 1506 has a voice that means business. It's bright, incredibly articulate, and has a dynamic punch that makes vocals and brass instruments leap out of the mix. The sensitivity is through the roof—whisper a watt into it and it'll shout back at you. This makes it fantastic for clarity and transient detail, especially in the upper mids where human speech lives.

The trade-off? It can be a bit ruthless. If your source material is harsh or poorly recorded, the 1506 will faithfully tell you all about it. There's not a lot of inherent warmth or forgiveness; this is a tool for projection and precision. When properly crossed over (keep that low-end junk away from it!) and paired with a robust woofer, it contributes a lively, immediate, and exciting top end that just can't be replicated by most modern dome tweeters. It sounds like the movies used to sound.

Maintenance and Restoration Tips

These units are pushing 50 years old, so a little TLC is almost always required. First, get that driver off the horn. Pop the cover off and give that precious 2-inch aluminum diaphragm a good look in bright light. Check for any hairline cracks or dents—even a tiny deformity will cause nasty distortion. If it's shot, the good news is that diaphragms for the more common 802-8G driver are a direct fit and still available new-old-stock or from quality repro manufacturers.

While you're in there, blast out the phase plug slots with compressed air; decades of dust and grime love to hide in there and dampen the sparkle. Check the terminal connections for corrosion and hit them with some DeoxIT. As for the horn itself, give the molded phenolic a careful inspection for cracks, especially around the mounting flange. They're tough, but not indestructible. If the driver's been apart before, make sure it's re-assembled with an even, firm torque on the bolts to prevent air leaks that will kill your efficiency. And for heaven's sake, use a proper high-pass filter—letting full-range signal into this driver is a great way to turn that expensive aluminum diaphragm into a fancy paperweight.

Collectibility and Market Value

On the vintage audio collectibility scale, I'd rate the Altec 1506 a solid 7/10. It's not the legendary 604 Duplex that makes collectors drool, but it has a strong, dedicated following among horn enthusiasts, DIY speaker builders, and cinema history buffs. Its value lies in its authenticity and utility. You'll typically see these drivers and horns selling in the $250 to $500 range, with the price heavily dependent on condition. A tested, working driver with an intact diaphragm on a clean, uncracked horn will command the top end. A "for parts or repair" unit with a blown diaphragm might go for under a hundred bucks.

The rarity is moderate—they don't pop up every day, but they're not exactly unicorns either. Complete, original matched pairs are the real prize, as they're perfect for a killer vintage stereo horn project. The demand is steady and knowledgeable; you're usually selling to someone who knows exactly what they're getting and has a plan for it. Just don't expect your average vinyl enthusiast to understand why you've got a giant black waffle on a shelf in your garage.