Klipsch Klipschorn (1946–Present)

They don’t just fill a room with sound—they command it, corner to corner, with the authority of a symphony conductor who refuses to compromise.

Overview

A Klipschorn weighs 167 pounds and goes into a corner, back panel flush against two walls, with the floor closing off the third. Once it's there, it works more like a built-in bookshelf than a speaker. It also projects the crack of a snare drum with the immediacy of a live performance. Even at moderate volume it hits hard. That's not distortion, just presence. Paul W. Klipsch didn't set out to build a speaker that would blend into your decor or disappear sonically. He wanted to recreate the dynamic range of a live orchestra in a living room, and he did it with physics, folded wood, and a refusal to follow trends.

The Klipschorn dates to 1946 and is still in production. It is the longest continuously manufactured loudspeaker in history. There have been no redesigns and no "modernized" versions that abandon the core principles. The model you can buy new from Klipsch today is functionally identical to the ones assembled in Hope, Arkansas, in the late 1940s. The design is a trihedral folded horn loaded into room corners. It uses the walls and floor as acoustic extensions of the bass horn, so the listening space becomes part of the speaker. While others chased sealed enclosures, ported boxes, and digital room correction, the Klipschorn kept working, louder and more efficiently than almost anything else on the market.

It's efficient: 105 dB sensitivity with just one watt, so it doesn't need a powerhouse amplifier. A 15-watt tube amp can push these to concert levels. That opens the door to vintage and low-powered gear that modern speakers would drown out. It is not a speaker for the space-constrained, though. It demands corners, clear wall space, and a tolerance for its physical and sonic footprint. It will not forgive poor placement. If your room has baseboard heaters, crown molding, or a desire for symmetry that doesn't include giant wooden horns in the corners, the Klipschorn will give you loose, flabby bass and a collapsed soundstage. Get it right - snug into the corners, aimed across the room, with clean wall runs - and you get coherence, scale, and dynamic punch that few speakers, vintage or modern, can match.

Specifications

Manufacturer	Klipsch & Associates
Production Years	1946–Present
Original Price	$137.50 (1947)
Current Price (New)	$8,000–$16,000 (varies by finish, limited editions)
Weight	167 lbs (75.8 kg) per speaker
Dimensions	52" H × 31.25" W × 28.5" D (132.1 × 79.4 × 72.4 cm)
Driver Complement	15-inch folded bass horn, 2-inch compression midrange horn, 1-inch compression tweeter horn
Frequency Response	35 Hz – 17.5 kHz
Sensitivity	105 dB @ 1W/1m
Nominal Impedance	8 ohms
Power Handling	100 watts (recommended)
Maximum SPL	121 dB
Crossover Frequencies	450 Hz (bass to midrange), 4.5 kHz (midrange to tweeter)
Cabinet Type	Trihedral folded horn, corner-loaded
Finish Options	Walnut, cherry, black ash, special editions (e.g., Australian walnut)
Terminals	Single binding posts (older models: screw terminals)
Production Location	Hope, Arkansas, USA
Serial Number Note	First production unit (SN 121) completed June 1, 1948

Key Features

The Horn That Eats Rooms

The trihedral folded horn is a resonance chamber that uses the room as an active component. The bass horn folds upward and backward inside the cabinet and ends at the rear apex, where the walls and floor complete the horn's mouth. This lets the 15-inch woofer reach deep bass extension (down to 35 Hz) without massive amplifier power or a large ported box. Corner loading provides an additional 6 dB of gain, effectively quadrupling the perceived output. That's why a 10-watt amp can drive these to spine-rattling levels. The catch is that the speaker must sit tight in a corner with unobstructed wall surfaces. Any gap, whether from baseboards, molding, or carpet, degrades bass response and timing. Klipsch once provided blueprints for "false corner" panels to solve this, and many owners still build them today. The horn's exponential flare is carefully calculated to maintain phase coherence and minimize distortion, a rarity in mass-market designs of the era.

High-Efficiency Driver Array

The bass horn does the heavy lifting, but the midrange and tweeter are no afterthoughts. The 2-inch titanium diaphragm compression driver fires into a separate horn chamber mounted atop the bass cabinet. It delivers midrange clarity that cuts through without harshness, when properly maintained. The 1-inch compression tweeter, loaded into its own horn, extends to 17.5 kHz with speed and detail. Both high-frequency drivers benefit from horn loading, which increases efficiency and directivity and focuses energy toward the listening position. Transients snap, and complex passages stay coherent even at high volumes. The trade-off is a narrower sweet spot than modern point-source designs. Move too far off-axis and the balance shifts - bass swells, highs recede.

Modular Construction and Serviceability

Despite the monolithic look, Klipschorns are designed for disassembly. The top section (midrange and tweeter) separates from the bass cabinet with a few bolts, which makes transport and repairs manageable despite the weight. It also allows incremental upgrades. Many owners retrofit modern crossovers, particularly the Bob Crites designs, to improve integration and reduce midrange glare. Original crossovers used paper capacitors and wire-wound resistors, which degrade over time and lead to uneven response and potential driver damage. Replacing them is almost expected in vintage units. The drivers are serviceable: compression drivers can be reconed, and the bass woofer, while large, is rebuildable by specialty shops. Klipsch still supports the model with replacement parts, a rarity for a 75-year-old product.

Historical Context

The Klipschorn emerged from a postwar era when high-fidelity audio was still a niche pursuit and most home speakers struggled to play loudly without distortion. Paul W. Klipsch, a Purdue-educated engineer with experience in acoustics, geophysics, and ballistics, applied scientific rigor to speaker design at a time when most manufacturers relied on trial and error. His work on folded horns began in the late 1930s and led to a series of patents between 1942 and 1945. The first production run in 1946 was just 12 units built by Baldwin Piano & Organ, using Western Electric tweeters and likely JBL woofers. By 1948, Klipsch had moved production to a repurposed telephone exchange building in Hope, Arkansas - the same facility still used today. The design used room boundaries as a free acoustic tool, achieving high efficiency and low distortion without exotic materials or massive amplifiers.

At the time, few competitors offered anything comparable. Altec Lansing and JBL focused on professional PA systems, while home speakers from companies like Fisher and Scott were often low-efficiency direct-radiating designs. The Klipschorn was expensive and imposing. Its efficiency made it a favorite among early audiophiles, many of whom used low-powered tube amps. Over the decades it became a cult object, adopted by DJs, sound engineers, and collectors. The 1970s saw Klipsch expand the Heritage line with the Cornwall, La Scala, and Heresy - smaller, more portable horn designs that shared the Klipschorn's DNA. The K-Horn remained the flagship.

Collectibility & Value

Because the Klipschorn is still in production, "vintage" models span decades, and prices vary wildly based on condition, era, and provenance. A well-maintained pair from the 1970s or 1980s might sell for $2,500 - $4,500, while pristine originals with original paperwork and rare finishes can fetch $6,000 or more. Modern new-old-stock (NOS) pairs in walnut or cherry list for $8,000, and limited editions like the 70th-anniversary Australian walnut model have sold for $16,000. Condition is everything. These are large, heavy speakers that have often been moved, refinished, or poorly maintained. Common failure points include deteriorated foam surrounds on the bass driver (leading to flapping or no bass), failed capacitors in the crossover (causing harsh highs or dead midrange), and warped cabinets from humidity or improper storage.

Before buying, inspect the following:

- **Cabinet integrity**: Look for cracks, warping, or water damage, especially at the rear apex where the bass horn terminates.

- **Driver condition**: The bass cone should be flat and centered; any sagging or tearing indicates surround failure.

- **Crossover**: Open the access panel and check for bulging capacitors or brittle wiring. Recapping is often necessary, costing $300 - $600 per pair.

- **Horn alignment**: Misaligned midrange or tweeter horns can cause phase issues and uneven dispersion.

- **Placement feasibility**: Measure your room. If you can't place the speakers tight into corners with at least 3 feet of clear wall on each side, reconsider.

Klipschorns are not "set and forget" classics. They need space, money, and technical upkeep. They don't flatter poorly recorded music; they expose it. With good material like live jazz, orchestral works, or classic rock, they deliver a sense of scale and realism that few speakers, vintage or modern, can match.