stevem Messages: 4739 Registered: June 2004 Location: NY
Senior Member
Metal film is the best for noise and also will not get noisy from moisture inclusion over time from heating and cooling.
They can also be had in very tight tolerance ranges.
With whatever resistor you are replacing if you go up 1/2 to 1 watt larger in size, that will make for even less noise and less resistance drift if or when they get hot.
Commonly used 5 watt Emitter resistors I like to increase up to 7 watt.