 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>  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".
 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 $ Headphones are regularly used by audiophiles. These products can be remarkably expensive, some over $10,000, but in general are much cheaper than comparable speaker systems. They have the advantage of not requiring room treatment, and being usable without requiring others to listen at the same time. Newer canalphones can be driven by the less powerful outputs found on portable music players. Design variety For music storage, digital formats offer an absence of clicks, pops, wow, flutter, acoustic feedback, and rumble, compared to vinyl records. Depending on the format, digital can also have a higher signal-to-noise ratio, a wider dynamic range, less total harmonic distortion, and a flatter and more extended frequency response. Despite this, vinyl records remain popular, and discussion about the relative merits of analog and digital sound continues (see Analog sound vs. digital sound). (Note that vinyl records may be mastered differently from their digital versions.) In the amplification stage, vacuum-tube electronics remain popular, despite most other applications having since abandoned tubes for solid state amplifiers. Also vacuum-tube amplifiers often have higher total harmonic distortion, require rebiasing, are less reliable, generate more heat, are less powerful, and cost more. 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".