The speaker building psychosis got the best of me again -- my new project is a segmented wire-stator type hybrid electrostatic speaker. Actually, not a whole speaker, just new panels to replace the welding rod panels in my old beam splitter ESL’s.
The photos show a stretching jig and stator wires being stretched to plastic deformation to make them perfectly straight and also work harden the metal so that they remain straight when the tension is relaxed.
The stator wires will be supported by wooden lattices (photo below). I think they're gonna look really nice.
There are 90 wires total, which will be segmented into (15) 6-wire groups. The center wire group will be directly coupled to the amplifier/step-up transformers and receive the full frequency band above 200 Hz. Moving from the center outward, the paired wire groups to the left and right of center receive discrete bandwidths that progressively step down in frequency. This is accomplished using an RC transmission line consisting of series resistors inserted between the wire groups which couple with the wires' capacitance to form first order filters.
The effect is that the flat panel electrostat now projects a cylindrical rather than planar wave front; giving wide dispersion and no beaming. The polar response will be far superior to a curved panel (like ML) and even better than most conventional speakers, while still retaining that magical ESL sound.
Got a long way to go here and a mile-long honey-do list impeding my progress—but I’ll get’er done sooner or later and I’ll keep posting build picks along the way.