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Tested and Working. This was pulled from a working environment. Please look at all pictures before purchasing, only what is included in pictures is included in sale. Will ship same day purchased in a professionally packaged box. (T)W23T
At USD180, this pair of KLH Model Fours is a screaming bargain against the typical used market, where recent comparables median at USD425 with a 25th percentile of USD100 and 75th of USD2,410. These vintage classics from the golden era of acoustic suspension design punch way above their price here, offering that legendary neutrality and bass extension if they're in decent shape—far better than many modern budget speakers.
Before biting, verify the woofers' surrounds aren't rotted or split, as 50+ year-old foam deteriorates fast and reconing runs USD150-300 per speaker. Also check for original crossovers intact with no drifted caps, and test for cabinet rattles or port buzz—measure impedance and sensitivity too, as mismatches can hide voice coil rubs. No stands or grilles? Negotiate harder.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
KLH Audio traces its origins to 1957 in Cambridge, Massachusetts, where audio pioneer Henry Kloss joined forces with Malcolm S. Low and Josef Anton Hofmann to form KLH Research and Development Corporation. Kloss, renowned for co-developing the acoustic suspension loudspeaker—a breakthrough that delivered superior bass from compact enclosures—propelled the brand to global dominance. By the early 1960s, KLH had become the world's largest loudspeaker manufacturer, employing over 500 people and distributing to six continents, with iconic innovations like the Model Nine full-range electrostatic speaker, the high-selectivity Model Eight FM radio, and the portable Model Eleven solid-state record player.
The brand's focus remains squarely on loudspeakers, blending heritage designs with modern engineering for two-channel stereo and home theater systems. Revived in 2019 under president David P. Kelley after decades of ownership changes, today's KLH reissues classics like the Model Five while introducing fresh models emphasizing acoustic suspension principles for accurate, room-friendly performance. Unlike broader audio categories such as amplifiers, turntables, or headphones, KLH prioritizes premium speaker categories rooted in its foundational expertise.
KLH occupies a respected mid-tier position in the hi-fi market, appealing to discerning buyers seeking high-value performance without ultra-high-end pricing. Its reputation endures among audiophiles for timeless sound quality, precision craftsmanship, and a legacy of democratizing superior audio—evident in its role introducing Dolby to consumer tape decks. Now headquartered in Noblesville, Indiana, KLH balances vintage allure with contemporary reliability, positioning it as a smart choice for knowledgeable enthusiasts building enduring systems.
See all KLH Audio listings on RADAR.
