Crown CDi 4000 Power Amplifier Crown CDi Series amplifiers are professional tools designed and built for installed sound applications. The series includes four models which are identical except for output power: CDi 1000, CDi 2000, CDi 4000, and CDi 6000. All are rugged and lightweight, and offer unmatched value in their class. VersatileExtremely versatile; rated for 2, 4, 8-ohm loads and 70V and 140V outputs. Switched-Mode Power SupplySwitch-mode universal power supply. Digital Signal ProcessingOnboard DSP includes crossovers, EQ filters, delay, and output limiting. PresetsUp to 20 user defined DSP presets are available. WarrantyThree-Year, No-Fault, Fully Transferable Warranty completely protects your investment and guarantees its specifications. CDi4000 Output: 1600W @ 2 Ohm Dual (Per Channel) 1200W @ 4 Ohm Dual (Per Channel) 650W @ 8 Ohm Dual (Per Channel) 3200W @ 4 Ohm Bridge-Mono 1000W @ 70V Dual (Per Channel) 2000W @ 140V Bridge-Mono