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In Reply to: hmmm posted by Penguin on January 1, 2014 at 13:16:18:
With no audio step-up, the impedance of the panels is much, much higher than 4 ohms. In fact, I measure about 25 ohms at 1kHz using a 1:90 step-up with no RC network, which means that the intrinsic Z of the panel is way up there in the thousands. (I am thinking it would be 25R times the square of the turns ratio, or 8100 X 25.) With the Sound Lab crossover network, yes, Z is as low as 4 ohms, at certain frequencies. But even with their massive bass transformer, Z does rise at low frequencies way above 4 ohms; I think I got around 50R at 50Hz via the SL bass transformer.However, your basic premise that increasing V necessitates an increase in power, all other things being equal, is of course correct. My only point was that I do not believe Power has to be anywhere near 200W. Because, for a big enough V swing, the current demand is nominal when you're driving the panels direct.
I edited this to change "your" into "you're" (you are). An error I commonly make in a first draft.
Edits: 01/01/14
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Follow Ups
- Where do you get 4 ohms? - Lew 14:43:45 01/01/14 (2)
- 4 ohms - Penguin 10:44:58 01/02/14 (1)
- RE: 4 ohms - Lew 11:56:46 01/02/14 (0)
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