KLH Model 11 (1962–1969)

The world's first transistorized portable stereo, with clip-on speakers and a faux-leather suitcase. It was dorm-room hi-fi that actually sounded good.

Overview

You unzip a Samsonite-style case, pop open the lid, and snap a speaker onto each end. That gives you a self-contained stereo system that looks like it came out of a 1960s college catalog. This is the KLH Model 11, a portable phonograph that changed what "compact" meant in the early days of stereo. Most suitcase players of the time had tinny built-in speakers. This one had separate acoustic-suspension drivers, a real turntable, and a fully transistorized amplifier, which made it a big deal in 1962. You could take it to the dorm, the beach, or a friend's apartment without giving up fidelity.

It also cost a small fortune at $200 in 1965, over $1,800 today. For that money you got high-fidelity engineering from Henry Kloss, who helped invent the acoustic suspension speaker at Acoustic Research before founding KLH. The Model 11 was not a toy. It was a full stereo system with FM radio, a built-in amplifier, and detachable speakers, all in a faux-leather case that doubled as protection and presentation. Closed, it looked like luggage. Open, it was a mini hi-fi rig that could hold its own against many home systems of the era.

The Model 11 sat below the more luxurious Model 15 and Model 20. It was KLH's entry into the portable market, though "entry" is a stretch given the price. It wasn't the cheapest option, but it was the first to use all-transistor electronics in a portable stereo, which got rid of vacuum tubes and bulky power supplies. That meant lighter weight, cooler operation, and portability on AC or battery power. Later knockoffs flooded the market with plasticky, record-chewing turntables. The Model 11 had solid construction and sound that rewarded careful listening.

Specifications

Manufacturer	KLH (Kloss, Low, and Hoffman)
Production Years	1962–1969
Original Price	$200 (1965)
Type	Portable stereo phonograph system
Turntable	Modified Garrard record changer with 16, 33⅓, 45, and 78 RPM speeds
Cartridge	Non-removable Pickering V-15/AT-2 (integrated headshell)
Amplifier	Transistorized solid-state, stereo
Speakers	Two detachable acoustic suspension speakers with 3-inch drivers
Enclosure	Faux-leather covered suitcase with walnut-veneer control unit
Inputs	Phono (integrated turntable), FM radio, auxiliary input (later models)
Power Options	AC mains or external battery pack
Weight	Approx. 25 lbs (system with speakers and case)
Dimensions (closed)	14" x 10" x 5"
FM Tuner	AM/FM or FM-only (varies by production year)
Special Features	Detachable speakers, vernier FM tuning dial (on later units), flip-up dust cover
Color	Mellow cream or ivory control panel with gray faceplate

Key Features

Transistorized Before It Was Cool

The Model 11 was an early adopter of transistor technology. In 1962, most portable phonographs still relied on vacuum tubes, which meant heavy power supplies, heat buildup, and fragility. The all-transistor design got around those problems and let the system run cool and quiet for hours. It was a deliberate engineering choice to deliver consistent performance without the maintenance headaches of tubes. The amplifier section was modest in power, but it gave clean, low-distortion output that suited the acoustic suspension speakers.

Acoustic Suspension in a Suitcase

KLH didn't compromise on speaker design just because the system was portable. The detachable speakers used the same acoustic suspension principle that made the brand famous: sealed enclosures with long-throw drivers for tight, controlled bass. For their size, the 3-inch speakers delivered clear sound and good low-end extension, especially next to the ported or open-back designs common in other portables. Because the speakers were separate from the turntable and amp, they avoided the cabinet resonance problems of all-in-one systems. You could place them apart for stereo imaging, or clip them on for convenience.

Garrard Turntable with Real Fidelity

Inside the case sat a modified Garrard record changer, not a cheap OEM unit. KLH worked with Garrard to customize the mechanism with a low-mass tonearm and precision motor pulley to reduce rumble and wow. The Pickering V-15 cartridge was integrated as a non-removable headshell unit. Together they delivered tracking accuracy and tonal balance that outperformed many home systems of the era. The 78 RPM speed was there for the lingering shellac era, and the 16 RPM option catered to spoken-word records and educational content, though that format never really caught on. Still, it shows KLH was thinking about real-world use, not just specs.

Historical Context

The early 1960s were a turning point for consumer audio. Stereo was no longer a luxury for audiophiles. It was becoming mainstream, and college students were among the first adopters. The Model 11 arrived when young buyers wanted quality sound but didn't have the space or budget for a full console system. Henry Kloss understood this. He had already brought high fidelity to a wider audience with the Model Eight radio, and the Model 11 carried that approach into portable form. It competed not with tabletop radios, but with emerging Japanese portables and the growing tide of low-end record players flooding the market.

Companies like Sony and Philips were experimenting with compact systems, but none matched KLH's commitment to acoustic performance. The Model 11 wasn't trying to be cute or retro. It was functional, elegant, and serious. It influenced a generation of all-in-one systems, even if most imitators missed the point. Later models like the KLH Model 15 and Model 20 refined the formula with better tuners and upgraded speakers.

Collectibility & Value

Today the KLH Model 11 is sought after by vintage audio collectors, especially in fully functional condition with original speakers and case. Survivors are relatively rare. They weren't uncommon when new, but their age and complexity make them prone to failure. Many were used hard in dorms, stored in attics, or cannibalized for parts. Finding one that powers on, plays records, and delivers balanced stereo sound is a win.

Prices vary widely based on condition. Non-working units or those missing speakers can go for $150-$300. Fully restored, tested systems with original documentation and packaging can fetch $600-$900, especially if they include the battery pack or original stylus. The cream-colored turntable and gray faceplate are particularly desirable.

Common failures include dried-out capacitors in the amplifier, worn belts in the turntable (though the Garrard mechanism is generally sturdy), and degraded wiring in the speaker cables. The non-removable cartridge cuts both ways: it prevents misalignment but makes stylus replacement the only upgrade path. Owners report that channel imbalance, often due to failing coupling capacitors, is a frequent issue, and recapping the amp is almost a prerequisite for reliable use. The faux leather can crack or peel, and replacement grilles are hard to find, though some specialists offer reproductions.

If you're buying, test everything: all speeds, FM tuning, volume balance, and speaker output. Check for corrosion on battery contacts and make sure the case latches securely. A broken Model 11 is a restoration project that can cost more than the unit's value.

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