Pioneer AD-50 with sony d-99 and b&o beovox 1700 - YouTube
Ecualizador Pioneer Ad-50 ((((( Old School ))))) Vintage - YouTube
Pioneer AD-50 equalizer booster now working...used to be distorted (garalgal) both channels am only using test speakers, don't expect much fidelity from... | By Pioneer Kp-500 Tp-900 Vintage Car Stereo | Facebook
How to adjust the sound using a 13-band equalizer? ― 130.com.ua