All DX amps have been fully revised and updated with new circuit boards to support 2008' specs. The new circuit boards will offer true digital class d amplification on the DX500.1V2, DX1000.1V2 and DX2000.1V2, the DX200.2V2 and the DX300.4V2, have also been outfitted with new Dual sided PCB boards to also improve on accuracy and performance! For further information please contact Elevation Audio at 315.853.5831