By Aditya Shukla - creator of the brain-based guitar method
The material and gauge of your strings.
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The height of your pickup, the electrical arrangement, the pots, the wiring, and the engineering.
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The material and size of your pick and where you pick on the length of the string.
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The Nut and Saddle break the strings vibrations, but some still remain that rebound on the bridge, which changes the tone.
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While totally oversold, the guitar's wood affects how your fingers move and what frequencies get absorbed. But they contribute very little.
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The cables, the insulation, the tolerance in manufacturing, the wear and tear, etc. It's not much, but is evident.
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Action is for playabiliity, so your action affects your fingers pressure, which then changes the tone.
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No cap. Fingers - how they touch the guitar, the pressure, the stickiness, the sound absorption, the muting, release and landing, micromovements, etc.
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