Been a while. Thought yall might get a kick out of this one. Tiny 75mm X 15mm free swinging ribbon in a huge cardboard horn. Response +- 2db out to about 13Khz all crossed around 350 Hz to a cheap 7 inch cone in a box. Old Goliath sub to fill in the bottom. A test of extreme's on the ribbon. It is alive, it is dynamic, it is present, it is emotional, and it does not have a hint of horn color IMO. I love big horns, and no crossovers above about 300hz-500hz . And almost any woofer sounds great below this point. In some ways the best sound Ive heard in a while. Humbling how audio can do this with such crudity if size not a concern ha. way more fun than the serious efforts ha.
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measurement was taken at 1 meter. its a simple corrugated ribbon approx 15mm wide by about 75mm long. A tiny free swinging ribbon. Thats all it is. Nothing new here. Only important issue is you must have very tight clearance between ribbon edge and magnets. Less than about 1/2 mm, OR the lower frequency will be compromised in sensitivity. Now that said this was just a fun test of extreems showing that a free swinging ribbon with very low resonance in a huge horn can give surprising lower freq results at lower listening volumes. I may be at around 83 db at seat max before ribbon stressed too much. The whole exercise was just to see whats possible if we load ribbon with a BIG horn. To go higher in volume u will need a much larger ribbon. It was just a fun , throw it together type thing that gave a surprising result. I have horn loaded other ribbons in past. A 6 inch long ribbon of similar build in a smaller horn that was near flat from 1k to 20k. That was more practical and useful and could play to around 105db peak at seat with only second order crossover and distortion well below 1% down low. Normally small ribbons have huge issues down there.
