The Gar1731 is discrete opamp based on the Melcor 1731–the predecessor to the API 2520.  CAPI describes this DOA as having smoother highs and lows than the 2520, while retaining it’s aggressive midrange.

Images courtesy of CAPI

Notable Features:

• Uses all modern, commonly available components
• Industry standard 2520 footprint
• Can be powered by +/-12 to +/-20 rails
• How much more black could the PCB be?  The answer is “none.”

Price:

• $17.31 for full kit
• $2.85 for PCB only

Products and more information available at capi-gear.com.