- Jan 10, 2019
Which 18sound model is this? I've never seen a compression driver measure like that before. Even the very good ones usually have high second order (above 1%) and low third order but not that low.How about a good CD (18 sound 1.4” model, HF garbage is largely dictated by the horn or waveguide and may look different on a better one):
View attachment 11686
View attachment 11688
As you can see it has a good flat response with very good directivity control. Better than any other design so far. It’s distortion is silly low. More amazing, look carefully at the drive level. Pro drivers are tested at far higher levels than consumer drivers. This tweeter can play far louder than any consumer tweeter can dream of with no distortion. Obviously the really Hf stuff is a little messier than the ribbon, but again, this is completely waveguide dependent. Even the measuring distance matters here. It’s caused by reflections in the waveguide. Other designs don’t have this problem and it’s not as audible a problem as it looks.