CON1458
API 550B 4-Band EQ 500 Series Module (Pre-Loved)
$1,800
$1,800
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Four bands of fully discrete EQ with proportional-Q behaviour
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Seven selectable frequencies per band for maximum flexibility
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±12 dB of boost/cut per band
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Switchable bell or shelf mode on high and low bands
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All-discrete design using API’s legendary 2520 op-amps
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Transformer-balanced output for punch and character
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500 Series format – compatible with all standard lunchboxes and racks
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Pre-loved unit in excellent working condition
Description
The API 550B takes the classic tone of the original 550A and expands its flexibility with four bands of fully discrete, proportional-Q equalization. Designed by API founder Saul Walker, the 550B is a staple in high-end recording and mixing environments thanks to its musical curves, fast workflow, and unmistakably punchy midrange. This pre-loved 500 Series module captures that iconic sound in a compact and rugged format, ideal for tracking and mixing alike.
With seven selectable frequencies per band, the 550B offers detailed tonal shaping across the spectrum. Its proportional-Q design ensures that changes remain musical even with aggressive boosts or cuts, while the switchable shelf options on the high and low bands make it adaptable to any source. Whether you’re sculpting vocals, drums, guitars, or the stereo buss, the 550B delivers results that sound finished straight out of the box.
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