KLH Model 23 (1968–1972)
The KLH Model 23 is a two-way acoustic suspension loudspeaker designed under Henry Kloss. It was produced from roughly 1968 to 1972 and sold for about $160 per speaker. It has a devoted following. One seller of restored pairs noted that many listeners actually prefer the Model 23 over the larger, more famous KLH Model 5.
The Model 23 is a compact floor-standing two-way, and that sets it apart in the KLH lineup. The cabinet measures 23.5″ H × 12.6″ W × 11.88″ D, finished in walnut veneer. The crossover places 10 to 16 ohms in series with the tweeter, depending on the position of a level control switch on the back of the cabinet. Total circuit DC resistance runs 14 to 20 ohms. The woofers carry handwritten cone weights (varying around 23-24 grams) and use large square magnets. Collectors have documented both details when comparing them to the Model 5's drivers. A KLH Models spreadsheet indicates the Model 28 used the same drivers, though specific driver sizes for the 23 aren't recorded.
The reputation of the Model 23 rests on its sound. One enthusiast source put it plainly: “They may not be the prettiest, but they sound great and you’ll love listening to them.” The acoustic suspension design delivers the tight, controlled bass KLH was known for. The level control switch lets you tailor treble response to taste and room acoustics.
Surviving information on the Model 23 comes mostly from collector forums and marketplace listings rather than period press. Audio (period reviews of the era) did not surface in the available record for this model, so the documentation here leans on what owners and restorers have shared. The Model 23 remains sought after on eBay, Reverb, and Craigslist, and restoration work commonly involves cabinet refinishing and grille cloth replacement. One Audio Asylum member reported picking up a pair at a thrift store in excellent condition for twelve dollars back in 2002.
Known Specs
- Type: Two-way acoustic suspension loudspeaker
- Production: 1968–1972
- Original price: ~$160 each
- Dimensions: 23.5″ H × 12.6″ W × 11.88″ D
- Finish: Walnut veneer
- Crossover: 10–16 ohms in series with tweeter (level control dependent); 14–20 ohms total DCR
- Designer: Henry Kloss
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Related Models
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