FD51-4PM is a Polymaker exclusive design which was built from the foundations of FD51-4OS. It has specific material requirements which help improve performance along with the a increase in printing difficulty. It is the best free driver of the lineup, so if your picking filaments, this is a great candidate. Want more bass? Keep your eye on the upcoming WF81 series!
Kits for components will be made available on eBay once parts arrive


- 120-16,000Hz Frequency Response
- 72dB @1W/1M
- 2W Max Power Handling
- 75dB Maximum SPL (Single)
- 81dB Maximum SPL (Pair)
What do I need to make FD51-4PM?
- PLA Filament (Polymaker Polymax PLA)
- TPE Filament (Polymaker TPU 95A)
- 2x (15x10mm) N35 Neodymium Magnets (Per Driver)
- 37SWG Wire (0.17mm) or 33AWG (0.18mm) copper wire
- Contact Adhesive Glue
What enclosures are available?
Want a cabinet to get you started, or ideas to make your own? Have a look at the cabinets I have already made which can be 3D printed at home by clicking on the link below:
FD51-4PM, like all the the FD51 line up has a 80x3mm screw thread built in to it, allowing it to support all the cabinets available and make your own. They also support Thomas Sandladerer’s M3-SK project, so you can experiment with the drivers and cabinets to find what best suits you.