Peavey DPC 750 Digital Power Converter The Peavey DPC 750 Digital Power Converter is a high-efficiency (over 90% at all power levels), switch-mode amplifier that utilizes the Phase Modulation concept. This concept offers the advantages of higher efficiency, lighter weight and greater reliability than traditional amplifiers. Its simplified internal layout, where the power amp and power supply are combined in one chassis, results in greater reliability and increased serviceability.