We sell a large range of Dynaco PAS and SCA upgrade kits, as well as complete new generation kits of the venerable Dynaco PAS preamp and Dynaco SCA integrated power amp. For all Dynaco PAS upgrade kits, be it for the PAS2, PAS3 or PAS3X, click here. For our new generation complete PAS & SCA kits, click here. These are first class kits, using high quality printed circuit boards and parts, complete with full and detailed assembly instructions. These kits have been selling for over 15 years now!