The JBLs are 18 ti. The ti an abbreviation for the titanium tweeters that jbl manufactured to be used in 4 different jbl model speakers manufactured in 1985 of which the 18 ti were the smallest. They came with all the original paper work and even a review from ovation magazine from july of 1985. All for 80.00 from a friend who had not used then in 2 years.