USING A HIGHER POWER REPLACEMENT IS A VERY VERY BAD IDEA!!
A resistor usually fails for one of two reasons;
1) because the speaker is subjected to more power than it can handle for a prolonged period of time, and the resistor fails because the designer intended it to fail before the speaker driver coil and act as a protective device.
2) this type of resistor can change in value over time, and when its value goes up it progressively goes even higher and overheats until it fails.
In any case, ALWAYS replace it with an exact replacement. If you use a higher wattage, it will no longer protect the speaker, and the voice coil will burn out before the resistor will. Resistors ARE cheaper to replace than speakers...lol.
Keep in mind that an amplifier that is rated for 100 watts (this is with low distortion), as an example, CAN and WILL put out 200-300 watts when it is driven to high distortion levels.
When an amplifier is driven to a level where it is distorting significantly, the speakers are probably being subjected to more continuous power than is safe for them, so use your head and TURN IT DOWN...duhhhhhh.
(the FJ code is confusing; it should have one or the other...F indicates a +/- 1% tolerance of the R value, while J indicates +/- 5%....?????)
Originally Posted by chashint
What happened to the resistor that made it fail?