Check the listing for details. Jean Hiraga Super Class A Amplifier PCB Set Premium Custom DIY 2x Blank PCBs. Condition: Brand New. Listed at 35.85 USD. The Jean Hiraga Super Class A Amplifier PCB Set Premium Custom DIY 2x Blank PCBs is a high-quality product designed by GLKR HiFi in Australia. This PCB set is compatible with universal brands and DIY amplifiers, making it a versatile option for audiophiles. The set features optional front-end regulated power ability and ground options, as well as optional front-end regulated power. The PCBs are white in colour and designed to deliver Class A amplification. This is an excellent choice for those who want to build their own custom DIY amplifiers. Listing is for Two Premium Blank PCB Boards.Jean Hiraga Super Class A 30W PCB Board set Custom Highest Quality Design, large. Condition is "Brand New".215mm X 80mm per board.2mm PCB, 2 Oz copper, HASL plated, Custom designI have Custom designed these boards myself.They are quite possibly the best ones to be found at the moment.I've done the design to be extra heavy duty and easy to assemble and get working.This design is known to be hard to build, I've hopefully made it easier.I will supply a parts list (Digi-Key numbers)And a schematic also.I've made some upgrades, this board can be setup as one 35v power input, or have dedicated 22v input power options as well.The earth's can be made as one, or separate front end, or a front end ground lift to the main ground also.The circuit can be assembled with NOS or all new available transistors available from Digi-Key.I put in hundreds of design hours taking many requirements for perfect function into account, very careful trace planning.I truly believe this is one of the best Jean Hiraga PCB designs available.It sounds amazing,My Facebook page is @DIYAudiophileI can offer personalised help for the build if needed