This is a new production connection kit for 122 (aka 6H) type Leslies, for installation into a vintage Hammond Console Organ by a qualified technician. It installs similarly, and serves the same purpose, as a vintage "428/8000" type Leslie kit. However, when comparing it to a vintage kit, this Boss Organ 122 kit has faster switching times (less lag when changing speeds), and a lower/regulated DC switching voltage which means less chance of a volume dip when changing speeds. It is compatible with stock relays and/or EIS type relays, including EIS 3-speed operation (stop function requires a 12v zener diode).
 
Hand built in the USA at Boss Organ.