Using logic level FET TK5Q60W with a 8R speaker

Using Arduino Audio
14

Bugger again.....5 / 50 = 0.1A

Should have been 12 / 0.1 = 1.2k

I do have rather a lot of metal oxide resistors I could use.

Trying to get the sound loud. What resistor would you suggest for small 3-4cm diameter speaker.