An equalizer containing only passive components, such as resistors, capacitors and inductors.
"DR. COBAN HAS RESTORED ALBUMS AND 45'S FOR ME OVER THE PAST SEVERAL YEARS. HIS WORK IS OUTSTANDING AND HIS CUSTOMER SERVICE IS SECOND TO NONE. HE KNOWS HOW DETAILED I AM AND IS SO PATIENCE AND KIND IN PROVIDING ME WITH THE BEST POSSIBLE SOUND FROM MY RECORDINGS. THANKS AGAIN."
