4k7 pots aren’t really a thing these days, pot manufacturers tend to use 1:2:5 instead of E3. STUFF - LOOK MUM NO COMPUTER says:
i cant find a 4k7 potentiometer for the cutoff can i use a 5k
yes its fine! to be honest you could even get away with a 10k, a lot of the actual values arent super important to be right, a lot of the capacitors can be any capacitance in the ball park. ive found it to still work just the same :). So to clarify you need linear pots which are taper B.
(we’ve discussed this before, e.g. here)