“The SR24 provides a full spectrum of natural sounding EQ on every source I've run through it yet. With all knobs at noon, the bottom end fills out and you'll hear a presences boost. Once you start spinning knobs, you'll find the lows and highs will start stealing the show.
“A clear winner for me on DI bass, drums/cymbals, and mixes. Having 4 fully sweep-able overlapping EQ bands provides an endless variety of options, even without low or hi pass filtering. My unit is dead quiet, and feels great to operate in hand. The face plate is easy to read and knobs are spaced sufficiently - so the unit is not "finicky" to operate.
API SR24 is a Smooth Operator.”
— Sweetwater Customer from Seattle, Washington
The SR24 is a two channel, four band equalizer in a two rack-space chassis. With a dedicated knob and/or switch for each control function, the SR24 is easy to use; by utilizing continuously-variable controls for both the frequency and boost/cut, the SR24 can be very precise in applying equalization to the selected audio material.
The SR24 circuit design is deeply rooted in API's history. From the late 1970's to the early 1980's, an audio company called "APSI" manufactured consoles and equalizers. Their 562 module was a 4-band, fully parametric equalizer which was designed by APSI and sold through API. Over the last several decades, these EQ modules remained a favorite among many studio engineers, but have become increasingly difficult to find. The SR24 is a faithfully re-engineered version of the original 562, offering the user 2 channels of classic analog EQ in one rackmount unit.