Capacity of Acoustat Monitor 4 single cell.

Member "Bolserst" recently gave a fine answer to your question, so I'll copy his response here:

The capacitance of the Acoustat speakers vary considerably depending on whether you are talking about the older series(which drive panels uniformly) or newer Spectra series with divided the panels which drove different sections thru increasing resistance depending on how many panels the model had. If you are interested in a particular model, let me know and I can get you a schematic and more details.

- For the older series, the panels are roughly 400pF. So a Model 1 was 400pF. A Model 2 or Model 1+1 was 800pF. The Model 2+2 was 1600pF etc… Some of the models like the 3 and 4 did use slightly narrow panels that were about 350pF instead of 400pF for central panel(s).

- For the newer Spectra series, only half of one panel(200pF) is directly driven from the transformer for the single height models like Spectra 11, 22, 33. The double height models like 44 & 66 had two of these sections in parallel, so 400pF directly driven from the transformer. All other panels have some resistance in series with them.