The HJFP1 is a class-A microphone preamp based around a FET gain stage and two juicy, custom-made transformers. The HJFP1 is the same circuit as Hamptone’s two-channel version, the HJFP2, and is similar to the popular FETBOY project (also designed by Scott Hampton). This preamp design is often described as “clear and open” in the linear range and “woolly and warm” when driven hard.

Notable Features:

• Relatively easy to build
• Custom transformers
• Discreet, class-A design
• Kit includes templates for building your chassis

Price: No longer available