Linear wrote:i see no idea why you would need more than 1% matched resistors. anything more than that is just snake oil i reckon. sure, if you're building test/measuring/scientific equipment then by all means, get 0.01% matched resistors. or if you're building a satellite or nuclear weapon, then the more accurate the better.
About the only DIY project I can think of that would benefit from 0.01% resistors (or better) is a discrete R2R ladder DAC of which there seem to be a few kits kicking around ATM. In fact that is one of the very reasons
IC fabs moved away from that style of DAC's - too costly to make and they got better specs turning resistor
mismatch into noise with Delta Sigma DAC's, such is progress.
but for music equipment - really? i almost think 5% is good enough, both my big consoles would be full of 5% carbon resistors and it all sounds pretty matched to me (for tolerances, the resistors are the least of our problems)
5% when they were new... if they are carbon comp = hygroscopic so they drift and get even noisier over the years.
Still, many PPL love the warm musical sound of Carbon Comp R's.
i remember seeing 600 ohm stepped attenuators from the 60's would have big-ass 10% carbon resistors with a bunch of holes drilled in them to match them up. if they had 1% resistors back then, i'm sure they'd have been more than satisfied with stock.
Chris