Well, you have to sustain the oscillation and make it high enough to drive the load of the speaker. Right now, I don't think you will hear too much from 7 cycles that decay to 0 in 0.01 sec if the resistance is 0.1 ohm.Okay so the reason for using an amp in a circuit like this is to restore energy, rather than to amplify the output signal so that I will be able to hear it once it comes out of the speaker?
Many components can sustain large current spikes if they are not prolonged. In this circuit, the larger the current spike, the shorter its period. A voltage of 6 volts across a 470 uf capacitor stores less than 0.01 joules. I don't think you have to worry too much.How about the idea which Bill_Marsden suggested of not using a resistor at all? I'm afraid that this will cause currents which are dangerously high and damage the inductor and or capacitor.