Radial Engineering PROD8 8 Channel Rackmount Passive Direct BoxThe ProD8 from Radial Engineering is an eight channel passive direct box mounted in a 19" rack mount chassis that does not require any powering to make it work. The high performance Radial transformers are extremely efficient and will both balance the signal and convert the high source impedance of a keyboard to a balanced, microphone level low impedance output. All channels are identical and completely isolated. Each channel features two inputs that