Tribute to OB-Xa Synthesiser T-Shirt Organic / WhiteFPC iconic acid house clothing and amazing t shirts and rave clothing, we are the bees knees of tees and more. Unofficial tribute tee for all lovers of the incredible Oberheim OB Xa synthesiser, regarded as a true classic and one of the best analog synthesisers ever made. The design uses the logo made out of a picture of the actual machine. Truly cool , original design, an official Future Past design not available anywhere else. It's been used in the