Shown is my Technics universal parametric equalizer in excellent working condition. All pots and switches cleaned and maintained 5 years ago including new indicator lights. This is a highly regarded and well built unit that will add subtle but audible sound improvements to any speaker system without adding any noise. There are no marks on the top, sides or face of this since it was never rack mounted. This unit can really wake up a premium speaker system. Please add 3% if using Pay Pal.