The Blossom is a simple, and easy to use, optical compressor based on the green channel of the Bloom (country mode) and features the exact same compression circuitry. It features an optical limiting circuit that takes its inspiration from compressors designed during the golden age of vacuum tube circuits. Optical compressors as they are called, are known for their transparency and subtlety. While the Blossom can provide a very aggressive response at more extreme compression settings, its real strength lies in its ability to add a gentle sweetening and roundness to the tone as the optical circuit works to polish off any rough edges in the sound. The frequency response of the compressor section is flat as a board and does not boost or cut any of your highs or lows. The Blossom can safely run from 9V-18V DC (center negative). Running it at 18V will give increased headroom and dynamic response. Do NOT exceed 18V! Controls - Volume This control acts as a master volume. Changes to the Comp and Mix knob will typically necessitate a change to the Volume control to keep the overall level the same.