The "K" in Kouplers™
A nod to John Karlson, who discovered the waveguide slot in the 1950s. He called them "air couplers" — they couple the driver with the surrounding air. Stephen has taken Karlson's concept further than anyone, developing a double-tube design with adjustable length through years of experimentation.
Why They Work
Conventional tweeters lose high frequency exponentially with distance — you have to sit in the sweet spot. The Koupler™ waveguide eliminates proximity effect entirely. Wide dispersion means everyone in the room hears the full range, from any position. No sweet spot required.
Universal Compatibility
Kouplers™ sit on top of your existing speakers — any brand, any type. They're passive, requiring no separate amplification. Just place them, connect them, and hear the difference immediately. Works with floor-standers, bookshelf speakers, vintage systems, and everything in between.
The Karlson Difference
Traditional tweeters beam. Horns color. Ribbons are fragile. The Karlson waveguide does none of these things. It produces coherent high frequency with wide, even dispersion — the sound fills the room naturally. Distance doesn't diminish it. Position doesn't change it.
