This is a new-production input preamp PCB for the McIntosh MC2100, MC2105, and MC2300 power amplifiers. This board closely follows the original component layout, and no changes were made to the original circuit design.

Here are the main differences between this board and the original:
  • 2 oz. copper with a gold finish (ENIG), plated through-holes, and matte black soldermask
  • Silkscreen reference designators and symbols on both sides
  • All component footprints are sized to fit the original parts. In addition, all axial electrolytic capacitors have footprints for radial parts of various sizes, both input film caps support two different lead spacings, and both electrolytic output caps can be substituted with film caps of the appropriate physical size. A capacitor sizing guide is included
  • Robust wiring turrets replace the original hollow posts that wires are soldered to
Includes one unpopulated input PCB, 15 wiring turrets, a resistor lead forming jig, an anti-static bag for storing your original board, and a thorough install guide with redrawn schematic, board layout, and parts list. You will need to order parts to assemble this board.

4/18/2024: Remaining boards have "B" grade cosmetics, meaning they will have minor scrapes visible on both sides which occurred during the manufacturing process. These do not impact the board's functionality whatsoever. We will have a new batch available in the next month or two.

We also sell these boards hand assembled and tested in a different listing on our eBay store.

Please do not install this board if you are not thoroughly familiar with safely diagnosing, repairing, and testing amplifiers at the component level with test equipment (signal generator, oscilloscope, load, etc.) and a current-limited power supply.