 There is also continuing debate about the proper use of negative feedback in amplifier design . Controversies There is substantial controversy on   the subject of audiophile components; many have asserted that the occasionally high cost produces no measurable improvement in audio reproduction. For example, skeptic James Randi, through his foundation One Million Dollar Paranormal Challenge, has offered a prize of $1 million to anyone who can demonstrate that $      7,250 audio cables "are any better than ordinary audio cables".
<meaning-changed>  There is also continuing debate about the proper use of negative feedback in amplifier design . Controversies There is substantial controversy on   the subject of audiophile components; many have asserted that the occasionally high cost produces no measurable improvement in audio reproduction. For example, skeptic James Randi, through his foundation One Million Dollar Paranormal Challenge, has offered a prize of $1 million to anyone who can demonstrate that $      7,250 audio cables "are any better than ordinary audio cables".
 There is also continuing debate about the proper use of negative feedback in amplifier design . Controversies There is substantial controversy on the various drivers in the enclosure. 7,250 audio cables "are any better than ordinary audio cables".