I * I * R = P
1.2 * 1.2 * 0.47 = 0.6768 W
So, 2W resistors are fine here (except if you have 4 Ohm speaker and you drive the amp to full power for long period of time).
1.2 * 1.2 * 0.47 = 0.6768 W
So, 2W resistors are fine here (except if you have 4 Ohm speaker and you drive the amp to full power for long period of time).
Well I may hook the amps up to a 2 ohm speaker load at some point and I would rather be safe then sorry. I just happened to have 2W available. For 3w or bigger I need to make an order.
Does quality of resistor in this area matter much? Will you notice a difference between a sand-cast or something better? I am guessing not.
Does quality of resistor in this area matter much? Will you notice a difference between a sand-cast or something better? I am guessing not.
I don't like the good things to go to waste. You can put 2 x 0R47 in series and parallel them to another two in series. That's equal to one 0R47/8W resistor.
When it comes to quality, aim for low temp. drift and precision, don't waste the money on boutique parts...
When it comes to quality, aim for low temp. drift and precision, don't waste the money on boutique parts...
I just found a local source of just what I need (no crazy shipping fees). I am going there tomorrow.
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