On Tue, Oct 11, 2011 at 4:11 AM, Michael Rigby-Jones wrote: > You don't actually need to use an inductor at that rate unless the > highest quality audio is a priority. =A0The speaker itself is an inductor= , > and a typical small low quality speaker will roll off well before 20kHz > anyway. Right, but I'm planning on making use of these 100 Watt 3-way speaker cabinets I have been collecting, as well as some 50 amp MOSFETS I have that won't turn on fully at (5V - BJT driver voltage drop) but are just fine with a 6 volt supply and some 12V SLA batteries capable of 10s of amps. Even though audio quality is not a concern I am pretty sure I am going to need to have an inductor in there to limit current, and a rather beefy one at that. -p. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .