CON1457
API 550A 3-Band EQ 500 Series Module (Pre-Loved)
$1,750
$1,750
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Legendary 3-band EQ, originally introduced in the late 1960s
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Proportional-Q design – bandwidth narrows as gain increases for precise shaping
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Five selectable frequencies per band for broad tonal versatility
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±12 dB of boost/cut per band
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Switchable shelf or bell curves on the low and high bands
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Transformer-balanced, all-discrete circuitry with API’s 2520 op-amps
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500 Series format – fits all standard racks and lunchboxes
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Pre-loved unit in excellent working condition
Description
A true icon in the world of audio recording, the API 550A has been shaping hit records since the late 1960s. Revered for its punchy character, broad tonal curves, and musical response, the 550A is a go-to equalizer for engineers who want tone that feels right from the first turn of the knob. This pre-loved unit delivers that same signature API mid-forward sound in the convenient 500 Series format.
Designed with simplicity and power in mind, the 550A features three bands of overlapping frequency selection, each with five fixed frequencies and up to ±12dB of gain. Its proportional-Q design automatically narrows the bandwidth as you boost or cut, keeping changes musical and focused. Whether you’re shaping vocals, drums, guitars or buss tracks, the 550A offers timeless tone and immediate results.
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