The 5500 is among the most highly regarded equalizers ever created due to the signature API sound and flexible design. Find the right combination of filters using the 4 overlapping bands with the ability to adjust the EQ range to 1/4 or or 1/2 gain for mastering grade fine tuning or broad adjustments with the selectable high and low shelves. Just passing signal through the 5500 gets you ‘that API sound’ from the custom API2503 transformer and the 2520 and 2510 OpAmps delivering +30db of headroom before clipping! Easily compare processed to unprocessed signal using the EQ bypass switch. Get the API tone and smooth musical sound that can only be found in analog filters!