Be smart when you purchase a true 18x DVD duplicator! Lots of 18x DVD Duplicator sellers are not selling true 18x speed duplicator. Why? Simply because their duplicators do not have three necessary components to achieve 18x duplication speed. These components are 18x or above bandwidth controlling unit, hard drive and 128MB buffer memory. Without these components, duplicators usually can't achieve true 16x duplication speed. A true 18x duplication speed takes about 5.5 min for 4.7GB full DVDR and about 3 min for half full DVDR. Please verify with your seller that you are buying a true 18x DVD duplicator before purchase. Remember that we guarantee all of our 16x DVD Duplicators can burn at true 18x speed!