Strictly necessary cookies keep you signed in. Optional ones help us see which pages land and which don't. Pick what you want — you can change it any time. Details.
Loudspeakers
Constant-directivity horn-loaded loudspeakers sold direct from a one-engineer shop in rural Oklahoma.
where to hear it
Are you a dealer carrying this line? Get on the map.
about pi speakers
Pi Speakers is Wayne Parham's long-running horn-loudspeaker outfit, built around a constant-directivity waveguide paired with a high-efficiency 12- or 15-inch direct-radiator woofer in a vented cabinet. The signature trick is the crossover region: Parham's two-pi and four-pi designs use carefully shaped overlap between the cone and the horn-loaded compression driver to flatten the on-axis response without collapsing the directivity pattern, which is the failure mode of most cheap horns. The result is the high sensitivity and dynamic ease that draws low-watt SET and push-pull tube listeners, without the cupped-hands coloration that has historically kept horns out of mainstream rooms. The range runs from the entry-level four-pi tower through the larger seven-pi and the corner-loaded Theatre and Cornwall-adjacent designs aimed at flea-watt amplifier owners. Most buyers order kits, raw drivers, or flat-pack cabinets and finish them at home; fully assembled pairs ship as well, but the direct-from-builder kit model is the cultural center of the company and the AudioCircle Pi forum that orbits it. Parham has been one of the more technically transparent designers in this corner of the hobby, publishing crossover schematics, polar measurements, and CAD files openly enough that the designs have been built and rebuilt by hundreds of DIYers over two decades. Pi is also the lineage company behind the Lone Star Audio Fest in Dallas, the long-running grassroots show that Parham co-founded and that remains the gathering point for the American horn, single-driver, and DIY tube community. The brand sits in the territory staked out by Klipsch Heritage, Volti Audio, and Classic Audio Loudspeakers, but well below their pricing and with a measurement-first, kit-friendly posture that places it closer to the AudioCircle DIY tradition than to the high-gloss boutique end of the horn world.