I am the original owner of this rare and beautiful set of Snell SUR 500 THX speakers. These were the first THX certified speakers, and bear the LucasFilm THX logo along with the Snell. The Left and Right fronts (LCR 500) are serial numbers 003011 & 003009. The Center (HCC 500) is Serial # 1748, and the sides are (SUR 500) are # 002220 & 002221 (the sides have the Snell mounting braced attached). Also included is the welcome letter from Snell, and a Snell EC 300 crossover switch. I have moved and downsized, and alas there is no room for these in my new house. But these need a good home. Will Ship Fedex in 5 boxes 2nd day air. Shipping approx $150.