The Shadow Hills Dual Vandergraph is a Class-A discrete stereo 500 Series compressor with topological ties to the behemoth Shadow Hills Mastering Compressor. This versatile module sounds thick as a brick, even before inviting any compression to the party. When it's time to start digging in, four switchable ratios go from gentle to aggressive while the sidechain filter section of the Optograph sits on the opposite side. Simple threshold and output gain controls are all you need to worry about to get your stereo mixes or groups under control. While the Dual Vandergraph may lack attack and release controls, each ratio has its own time constants to give you a range of sounds from fast and punchy to slow and gooey. Use the gentler ratios across an entire mix to give your track a bit of glue and polish, or strap it across a drum buss and and absolutely pummel it for explosive pumping sounds. To sum it up, if you've got two empty spaces 500 Series frame, you should probably have a Dual Vandergraph.