Fairfield Circuitry Long Life  Parametric EQ w/ Tilt & CV *Free Shipping in the USA*
    
    
    
      In the words of Fairfield Circuitry:
A state-variable filter with wide range and application. Versatile. 
Combining tilt and notch/boost equalization around a 2nd-order 
(-12dB/octave) state-variable core.