MXL Microphones promises studio quality sound in a USB microphone. mxl microphone usb. MXL Microphones announced a new condenser microphone that plugs into a computer's USB port. MXL Microphones announced a new condenser microphone that plugs into a computer’s USB port. The company claims the MXL USB.006 microphone will bring "big rich studio" sound to both PCs and Macs. The MXL USB Condenser microphone will be available in September for $170....