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AudioControl Vintage AudioControl Model D520 ... - Reverb
https://reverb.com/item/37947195-audiocontrol-vintage-audiocontrol-model-d520-parametric-equalizer-speaker-control-system-w-subsonic
Not being able to position your speakers well in your listening room, can be overcome with the AudioControl Model 520 equalizer. A revolutionary product …
Audio_Control_520B_Equalizer_ : Audio Control : Free ...
https://archive.org/details/Audio_Control_520B_Equalizer_
Gerard Arthus Language English This is a User's Manual for Audio Control Model 520b Equalizer, manufactured by Audio Control, 6520 212th Street, SW B-1, Lynnwood, Washington 98036. Dimensions are: 8 1/2" width by 5 1/2" height and …
Audio Control D-520 Equalizer / Speaker Control System ...
https://www.youtube.com/watch?v=GUg1t8liMTc
Audio Control D-520 Equalizer / Speaker Control System
Audio Control Model 520 Equalizer/Speaker Control System ...
https://www.hifiengine.com/manual_library/audio-control/model-520.shtml
Manual Library / Audio Control. Audio Control Model 520. Equalizer/Speaker Control System/Subsonic Filter. add a review. Specifications. Series B; Input Sensitivity: 1V (7.5V max) Output Level: 1V (7.5V max) Frequency response: 3Hz to 100kHz. Signal to Noise Ratio: 90dB. Total harmonic distortion: 0.4%.
AudioControl D-520 Equalizer Speaker Control System W ...
https://www.canuckaudiomart.com/details/649482955-audiocontrol-d520-equalizer-speaker-control-system-wsubsonic-filter/
Not being able to position your speakers well in your listening room, can be overcome with th AudioControl Model 520 equalizer. A revolutionary product for its time, the 520 had five rotary controls for each channel with frequencies centered on 36Hz, 60Hz, 120Hz, 1KHz and 15.5KHz. It also had an 18dB/octave subsonic filter at 20Hz.
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