This is probably my favorite wireless replacement option for your 600Mhz systems. The Shure QLXD series of wireless systems are reliable and rugged. Each of the handheld units are made completed of metal and the metal bodypacks are wonderfully rugged as well. You will notice a major difference in clarity with this digital systems in comparison to any analog system. The lack of companding lets the true tone of the capsule shine through! Some other key features of this system are included rackmount kit, detachable antennas for use with antenna distributions systems and network connectivity to allow for remote management. A simple cat5e connected to your network switch will allow you to manage the system and remotely monitor battery, signal and audio levels from your PC or Mac via Wireless Workbench 6. I chose to show this unit paired with the Beta 87A Condenser capsule because it is one of my favorite capsules for speaking and detailed singers while not being prone to feedback. This system is available with many other Shure capsules and can receive any aftermarket capsule threaded for a Shure handset. Please support us by purchasing through the link below!