distortion detector

In like new condition. Used on several amplifiers to set gains. https://www.amazon.com/dp/B07QB4TNLV/?tag=caraudiocom-20

For sale is a used one time SMD DD-1 that was purchased in the very first initial sale prior to mass production. Its autographed by Steve Meade, if you care for that. I didnt even know he was going to sign the pre-order units. I dont have the need for this anymore and its just collecting dust...