Il est pas super transparent le Diamond, il boost un peu les fréquences médiums (eq en position neutre) mais c'est pour ça qu'on l'aime, entre autres, l'absence totale de souffle aussi.
“The type of cap is not as important as the value of the cap, for guitar. In an Amp, your cap type is much more important, as the signal is being passed through the cap all the time. In a guitar, you’re not hearing the cap itself, you’re hearing what the cap is impeding”. Lindy Fralin