Tone controller - Pre amp

[heew]

Im building a low cost pre amp these days.  I thought to use  Trimpots as the tone controllers in the pre-amp since I don't need to controller the tone after set it according to the my requirements. Is it possible to use trimpots for audio controlling ? Some please give some advices.

[hex_void]

You can use trimpots if you don't have to adjust the tone too often. They'll work just fine.

[Thecomedian]

Most trim pots have much more limited lifespan than Potentiometers. They're designed to be "set and forget". If you want to set and forget a pedal to a specific tone, that's fine. Other than that, they're mostly a way of getting very narrow tolerance bands for resistance. If you have an 8.6k resistor in a pedal that must be exactly 8.6k, that's what a trim pot is for.