Well there is no KIT . Only hand assembled amplifiers and the rest. As for the BA 5000 the biggest power amp SANSUI ever made , it was not the only one. B2301 B2302 G33000 had the same power rank. They all sounded a bit different compared to BA 5000, actually better. The one and only B2301 , B2301L , B2302 actually sounded a lot better than the good old BA 5000.