Altec Lansing 34726 2-Inch Compression Driver

Name: Altec 34726
Brand: Altec

Let's talk about the Altec 34726, the unsung hero of the big, brash, beautiful world of vintage pro audio. This isn't just a driver; it's a chunk of sonic history you can hold in your hand. Developed in the late 1960s and 1970s, this high-efficiency beast was the muscle behind the magic in countless movie theaters, PA rigs, and early studio monitors. It's the component that gave those legendary "Voice of the Theatre" systems their commanding voice.

Think of it as the engine in a classic car—you don't see it when the system is together, but boy, do you hear it. Its job was simple: take the signal, crank the efficiency to eleven, and blast it through a giant horn with enough clarity to reach the back row of a cinema. It’s built like a tank, sounds like a revelation, and has the kind of straightforward, no-nonsense engineering that makes a collector's heart sing.

Specifications

Type	Compression Driver
Throat Size	2 inches
Diaphragm Material	Aluminum (standard), Phenolic (some variants)
Impedance	16 ohms
Sensitivity	~110 dB (1W/1m)
Power Handling	Not officially rated (system-dependent)
Frequency Response	Optimized for mid-high range (horn-dependent)
Mounting	Bolt-on flange for horn attachment
Terminals	Screw-type binding posts
Recommended Horns	Altec 802, 811, and similar large-format horns

Historical Significance

The Altec Lansing 34726 was engineered as a successor or companion to earlier Altec drivers like the 285 and 802 series, designed to meet the demanding requirements of cinema sound reinforcement and broadcast studios. It was frequently used in conjunction with Altec's dual-concentric systems, where it would be mated with a low-frequency driver in a coaxial configuration.

Its deployment in the famed "Voice of the Theatre" (VOTT) systems cemented its legacy in audio history. These systems were installed in countless movie theaters, concert venues, and recording studios across the United States and abroad, delivering powerful, clear sound at a time when high-fidelity reproduction was still evolving.

The 34726 exemplifies Altec's commitment to reliability and sonic excellence during the vacuum-tube and early solid-state eras. Its design prioritized efficiency and durability, allowing it to perform under high acoustic loads without distortion or failure.

Sound Signature

Okay, here's the good stuff. Fire up a 34726 on a proper horn and you get that classic Altec "shout" – but in the best way possible. It's not a modern, polished, hyper-detailed treble. It's a bold, forward, and incredibly articulate midrange that pushes vocals and brass right into the room with you. The highs are crisp and extended, but there's a warmth underneath that keeps it from ever sounding harsh or clinical.

This is a driver that loves power, but ironically, it needs very little of it. Its insane sensitivity means a flea-watt tube amp can make it sing loud enough to annoy your neighbors three blocks over. It’s dynamic, immediate, and has a way of making music feel alive and physical. It’s not the most "accurate" by today's anemic standards, but it’s thrillingly, unapologetically *real*. It’s the sound of authority, the kind of driver that doesn't ask for permission to be heard. You want subtlety? Go listen to a bookshelf speaker. You want to feel the trumpet section in your chest? That's the 34726 talking.

Maintenance and Restoration Tips

As with any vintage audio component, the Altec 34726 may require maintenance to restore optimal performance. First and foremost, check the diaphragm for tears, warping, or corrosion on the aluminum or phenolic material. Replacement diaphragms, like the original NOS 34726 SYMBIOTIC pairs you can still find, are out there but getting pricey—we're talking $300 or more for a pristine pair, and you'll feel every penny when you click "Buy It Now." Next, clean the screw-type binding posts with contact cleaner and inspect for oxidation. Use a multimeter to verify voice coil continuity and check for short circuits or open windings—a dead coil is a real heartbreaker. While not standard in early models, some later units may have used ferrofluid; if present, degraded fluid can impair performance and should be professionally cleaned or replaced. Always ensure the driver is paired with a horn that matches its 2-inch throat size for proper loading. Finally, inspect the mounting bolts and flange for rust or stripping. A little anti-seize compound when reinstalling can save a lot of future headaches.

Restored 34726 drivers are often integrated into modern vintage-inspired speaker builds, prized for their authentic mid-century sound. Just remember, this is a driver that rewards patience and a gentle touch—don't go cranking a 200-watt solid-state amp into it the moment you get it working, unless you enjoy the smell of burnt voice coil in the morning. Treat it right, and it'll outlive you.

Collectibility and Market Value

The Altec Lansing 34726 holds solid, workman-like collectible appeal, rated 7 out of 10 among vintage audio enthusiasts. Its value lies in its historical use, build quality, and compatibility with classic Altec systems. Units in working condition with original diaphragms typically sell for between $100 and $300 each, with phenolic diaphragm variants often commanding higher prices due to their perceived sonic superiority. Just the original diaphragms alone can fetch over $300 for a NOS pair, which tells you something about the scarcity of good parts.

While not as widely sought after as the Altec 802 or 604, the 34726 remains a respected component among restorers and DIY audio builders aiming to recreate the legendary "Altec sound." It's a workhorse driver that doesn't get the spotlight often, but it's absolutely essential to the systems it powered. Think of it as the reliable character actor in a film full of stars—you might not know its name right away, but the whole show wouldn't work without it. For the right person building a period-correct monster, it's pure gold.