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Originally conceived for use in API consoles of the '60s and '70s, the 560 is a unique device designed to accomplish tasks that no other EQ can. Extremely fast to set and reset using accurate zero detents, the curve shaping potential of the 560 remains unmatched. With a wide range of 500 mounting options, from racks to consoles, the 560 proves an invaluable asset to all critical performance applications. Based on API's original 560 EQ, the current production 560 has improved resolution in the ±4 dB area and possesses our exclusive circuitry and proprietary components, including the API 2520 Op Amp.
The extraordinary headroom made possible with the 2520 offers consistent analog performance even when using radical EQ curves. Of course, the 2520's ability to drive low impedance loads is key when it is paired with API's custom output transformers. The results are quite audible with better low frequency reproduction and tighter imaging, which gives you that legendary API "punch in your gut" sound.
The 10 precision EQ bands make the 560 ideal for signal sweetening and room tuning. A great companion to a parametric EQ, the 560 utilizes API's unique "Proportional Q" design introduced during the '60s. This design intuitively widens the filter bandwidth at lower boost/cut levels and narrows it at higher settings. Additionally, boost and cut characteristics are identical, allowing previous actions to be undone if desired.
Reliable, durable and uniform, the API 560 EQ delivers that "one-of-a-kind API sound" with precision easy set filtering and high headroom in a compact package. If you want the sound of classic American music in an easy-to-set graphic EQ package, you want the API 560.
10 bands of API proprietary equalization
Familiar graphics operation on one octave centers
12 dB of boost/cut per band
"Proportional Q" narrows filter Q at extremes
Additional resolution within the ±4 region
Center detent for reliable reset
Silent bypass button
Based on the original 1969 API 560 EQ
Number of Bands: 10
Filter Type: Proportional Q, Octave entered, Continuously Adjustable Level
Filter Frequency Centers: 31, 63, 125, 250, 500, 1kHz, 2kHz, 4kHz, 8kHz, 16kHz
Filter Boost/Cut: +/- 12 dB
Filter Slope: 12 dB per Octave at full boost or cut
Input Impedance: 20k Resistive, Balanced
Output Impedance: Less than 85 Ohms
Nominal Levels: -15 to +15 dBu
Clipping Level: Better than +28 dBu
Frequency Response: +0, -.25, 30 Hz to 20kHz
Noise: -95 dBu EQ Out, -90 dBu EQ In, Unweighted 20 to 20kHz
Distortion: .05% max, @ +20 dBu Output
Connectors: 15 position .156 sp edge connector
Size: 1.50" X 5.25" X 6" Deep
Shipping/Actual Weight: 2 Lbs/1.5 Lbs
Power Requirements: ± 12/18 Volts/DC @ 60 ma.
Rack Frame and Power Supply Options: Fits 500V (10 slot rack, requires API 200PS Power Supply, 500H (2 slot rack, internal power supply), 500b "lunchbox®" (4 slot portable rack with internal power supply), API Legacy Consoles and vintage API Classic Consoles.
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