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  1. Hi HarryA, Thanks for the suggestion. It looks good but in the first paragraph of the datasheet makes me wonder sense is says... "The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4X load and 38W into 8X with 0.1% (THD a N) from 20 Hz –20 kHz." 20Hz? I wonder if they just say that to appease savvy audio people or can the chip actually amplify DC & sub 20Hz frequencies. I would think no caps on the input side would be important so the diagram you mention in there without caps make sense for sub 20Hz but I won
  2. Hello, I'm working on project to produced Pulsed ElectroMagnetic Fields (PEMF) at LOW frequencies (0-100Hz) using various wave functions. (sine, square, triangle, sawtooth) The whole design is very similar to what an audio amplifier and speaker setup would be since speakers are essentially coils with low resistance/impedance. The input signal would ideally come from a 3.5mm headphone jack or even better Bluetooth as I see some small pre built class D amplifiers include such. I've considered using OpAmps, transistors, Mosfets but seems pre-built class D amps gets me near 95
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