Since I use low tunings, drop b and C# Std., the 18 volt mod in my new KL made such a difference to me it makes me kick myself in the ass for not doing it sooner. However, it could be subjective to the ear if it is making a difference or not, because as a whole sound, there may not be just noticable differences made, however if you really sit and fiddle with the guitar, play single notes down the neck, getting lower and lower and compare it to a guitar with the standard 9 volts, it becomes very obvious what it is doing. Since it doesn't have the clipping of the preamp, the notes are much more pure, and this I find esepcially true in the low register which you normally don't hear a whole lot of difference in, the 2 and first fret notes. You can actually makes distinctions in pitch, even with high gain, high volume settings that are much harder to distinguish with the std. 9 volt set-up. To some ears it may sound as if the amp is running with a lower gain setting, not by much, but just a hair, which brings EVERYTHING out more. Chords sound more full and distinguished, palm mutes are more punchy and squeals rip out of the amp. It makes for an overall more percussive attack and sound as well, both distorted and clean. Basically across the board the 18 volt mod, for me anyways, is an amazing upgrade, it makes EMG's sing more naturally than the 9 volt set-up EMG's are readily used to being heard with.
-Ans-
