The 664 Expansion and Portability Kit from B&H includes both the CL-6 Input Expander and a Porta Brace MXC-664/CL6 combination case. This a great option for current owners of the 664 Mixer; get more input connectivity and a case to carry and protect both items.
The CL-6 Input Expander from Sound Devices adds 6 balanced, line-level inputs to the 664 Production Mixer. The Input Expander connects to the top or bottom of the 664 and includes 6 full-sized fader controls, PFL control and highpass control. It also features dedicated L and R routing buttons for Inputs 7-12 on the 664 Mixer.
The Porta Brace MXC-664/CL6 is made of lightweight but durable 1000-denier cordura and offers storage for the Sound Devices 664 Mixer and CL-6 Input Expander. It also features removable RM-Multi Wireless Mic Cases and comfortable suede straps so your mixer can be worn around your neck or over your shoulder. Flaps, clear vinyl windows and protective coverings provide access to cable openings, batteries, dials and switches.