Conversation so far:
What is Amplifiers?
Carlos Santana's distinctive guitar tone is produced by PRS Santana signature guitars plugged into multiple amplifiers.
What do the amplifiers do for Carlos Santana?
Santana compares the tonal qualities of each amplifier to that of a singer producing head/nasal tones, chest tones, and belly tones.

Question: Are there any songs that he uses his amplifiers on?
Self-contained rewrite: Are there any songs that Carlos Santana uses his amplifiers on?