In Stock. 45 Day Lowest Price - 100% Satisfaction Guarantee. What could be hotter? Already an industry standard, the new Aphex 204 Aural Exciter with Optical Big Bottom is one of those must-have processors that no rig should be without! The 204 delivers increased presence, depth, and clarity to your recording, mixing, and mastering projects, and does it all with little or no increase in peak output! The Aural Exciter's patented processes restore natural brightness through dynamic harmonic enhancement.