The Radial WM8 Mixer for Workhorse lets you upgrade your WR-8 500-series Rack into a fully-fledged Workhorse Power-rack. The Radial WM8 features level and pan controls for each of the 8 slot of the WR-8 Workhorse and lets you mix and match modules and create new sounds by combining modules in series and parallel. In addition, the Radial WM8 features a complete monitoring section complete with main and monitor control, heaphones output and mono switch.