The MA3 Module Adapter Kit allows Bogen s latest line of input modules to work with the D-Series line of amplifiers (Models DMA40, DMA80, DMA160, DMP06, and DPA160). One MA3 kit can adapt up to 3 modules in a single D-Series amplifier. Two MA3 kits can be used in the same D-Series amplifier to adapt up to 6 modules.