Not so sure -beware, i do not want to begin a war here- because, if you choose a low current for the led, a big cap will provide a low AC impedance at first, but on sustained playing it would be inefficient.DrNomis wrote: Leds typically need a maximum of 20mA to light, the brightness of the led varies in proportion to the supply current, being a Diode, it will exhibit a constant voltage-drop across it, if you use a resistor-and-led to drop 9V down to 1.6V, and are worried about impedance effects, there's a simple solution, just bypass the led with a 470uF/16V electrolytic capacitor, you can use the led as a power on indicator too....
You cannot feed a 50 watts amp with a 10 watts power supply, no matter the filtering caps you put in it.
As an example, i was working on a comp this week, a transparent one with no delay, no squash etc, it's filtering is a 150 ohms resistor and a 100µf cap for a max 5ma consumption (not at all the same as the FZ-1A, it's an example not comparison) and it was squashy as hell, tiny lows etc.Took me a lot of time to figure out that my circuit was as good as my prototype, but i was using an old battery
So, in all cases (resistive divider or led regulator) the source must be feeded with 5 to 10 times the current that the circuit will draw.