API Audio 550A

API Audio 550A – discrete 3-band equalizer with reciprocal filtering at 21 points, 5 steps of boost/cut up to 12dB per band.

High/low bands selectable peaking/shelving; band-pass filter. Proportional Q narrows bandwidth with gain. 500 Series modular format.

MAIN FEATURES

• 3 overlapping bands with 7 frequencies each
• Peaking/shelving on high/low
• Band-pass filter
• Proportional Q for musical EQ
• Pushbutton in/out
• Dual-concentric switches

TECHNICAL SPECIFICATIONS

• Bands: 3-band discrete
• Boost/Cut: ±12dB per band
• Format: 500 Series single-slot
• Power: 500 Series slot