A Stereophile Recommended Accessory for the Last 18 Years: Recommended by John Atkinson, Sam Tellig and Robert Harley The AudioPrism CD Stoplight (the green pen) is the original CD tweak. Just paint the edges of your CDs to greatly reduce disc read errors and reduce jitter while improving clarity and reducing glare. We have sold the CD Stoplight to thousands of customers in the last decade. This tweak really works and it's affordable and simple to use. "This stuff works! The cost per disc of this tweak is almost zero...it offers a big bang for the buck and can be confidently recommended!" - John Atkinson, Stereophile
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