The GKL522 is a discrete opamp based on the publicly shared 2*5*2*0 schematic. And while it does not claim to be a replica of any existing DOA, its performance and sound are very close to the vintage unit upon which it is based.

• Surface mount components reduce noise and improve thermal handling
• Comes pre-assembled and burned in
• Hand matched input transistors

Price: $55
More Info: Currently unavailable