API 565 Discrete Filter Bank

The API 565 Discrete Filter Bank Delivers the Filtering Circuitry of Large Consoles in an Accessible 500 Series Package

The 565 Filter Bank module has circuits that are true to the musical filters of the famed 215 module found in large format API consoles.

• Sweepable low-pass filter (500 Hz to 20 kHz, -6 or -12 dB slope)
• Sweepable high-pass filter (20 Hz to 400 Hz, -12 or -18 dB slope)
• Variable notch filter with adjustable Q (fully sweepable between 20 Hz and 20 kHz)
• Individual bypass switches for each filter section
• Transformer Balanced Output to +28 dBu
• Traditional API fully discrete circuit design
• Uses API 2520 and 2510 Op-Amps as well as the same discrete transistor buffers used in the famous 550 series equalizers

SPECIFICATIONS

• Number of Bands: Three
• Filter Types
• Sweepable Shelf Low Pass
• Sweepable Shelf High Pass
• Adjustable Active Twin-T Notch
• Filter Frequencies
• Low Pass: 500 Hz to 20 kHz
• High Pass: 20 Hz to 600 Hz
• Notch: 20 Hz to 20 kHz (3 selectable ranges)
• Notch Filter Q: Variable from 0.95 to 15.3
• Notch Filter Cut: Greater than 40 dB at minimum Q setting
• Input Impedance: Greater than 20 kOhms, Balanced
• Output Impedance: 75 Ohms, Transformer Coupled, Balanced
• Nominal Levels: -15 dBu to +15 dBu
• Clipping Level: +28 dBu
• Frequency Response: +.2, -.4, 20 Hz to 20 kHz
• THD+N: 0.02% (+4 dBu output @ 2 kHz)
• Connector: 15 position .156-inch sp. edge connector
• Power Consumption: +/-16VDC, 100mA max at +24 dBu out
• Size: 1.5 x 5.25 x 6.75 inches / 38 x 133 x 171 mm

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