ADC Audio Dynamics 500 Professional Frequency Equalizer Tested Works

Up for sale is a classic ADC Audio Dynamics Model 500 Professional Frequency Equalizer in good working condition.

The unit has been tested and is fully functional. All slider controls, push buttons, front panel controls, and illuminated level meter operate properly. The attractive brushed aluminum faceplate and real wood cabinet make this an excellent addition to any vintage hi-fi system.

Testing Performed

• ✅ Powers on properly
• ✅ Audio passes through both channels
• ✅ Equalizer functions correctly
• ✅ All frequency sliders respond properly
• ✅ Push-button controls operate correctly
• ✅ Stereo level meter is illuminated and functional
• ✅ Tested with audio playback

Cosmetic Condition

Good vintage cosmetic condition with normal signs of age.

• Minor scratches and wear consistent with age
• Wood cabinet remains in good overall condition
• Front aluminum faceplate presents very well
• Please review all photos carefully for the exact cosmetic condition.

Features

• Vintage ADC Audio Dynamics Model 500
• 10-band stereo graphic equalizer
• Independent Left & Right channel adjustment
• Illuminated stereo level meter
• Tape Monitor Loop
• Record Output
• Bypass (EQ Defeat)
• Meter Output function
• Real wood cabinet
• Made in USA

Includes

• ADC Audio Dynamics Model 500 Equalizer
• Attached power cord

No original box, manual, or accessories included.

Notes

This equalizer has been tested and is working properly. Due to the age of vintage electronics, periodic cleaning or calibration may be beneficial depending on your audio system.

Please examine all photos carefully, as they are part of the item description.

Item Specifics

• Brand: ADC Audio Dynamics
• Model: 500
• Type: Stereo Graphic Equalizer
• Number of Bands: 10-Band
• Channels: Stereo
• Color: Silver / Walnut
• Features: Illuminated Meter, Tape Monitor, Bypass Switch, Record Output
• Country/Region of Manufacture: United States