Enhance the performance of the EMC 1 MKIV with the Spider Clamp. The Spider Clamp is developed by Electrocompaniet to make the EMC 1 MKIVperform even better. In addition to holding the CD down on the spindle, the spider also centers the CD on the spindle which improves the reading of the CD.The Spider Clamp is available in three colors: black, blue and silver.