The SP capacitor packs from Angela - Gilbert Yeung are specially constructed banks of capacitors to greatly increase the power reserve of the preamp or line stage of an audio component. The size and composition of the capacitors is specific to the model of SP Capacitor Pack and have been carefully selected over years of A/B testing for the best performance and what it does for the sound.
The SP Cap Pack 15 is the midrange model upgrade for an additional 1,500,000uF of internal capacitance, or 1.5 Farads!