ICEpower 50ASX2 45Watt per channel Stereo Amplifier

thingiverse

This is a comprehensive enclosure for an ICEpower 50ASX2SE Class D Audio Amplifier module, a powerful 50W stereo amplifier (45W/channel at 4 ohms) board produced by the renowned Danish company Bang and Olufsen. To avoid confusion with some low-quality "50W" amplifier boards on the market, note that this is not one of them. Until recently, ICEpower modules were exclusively sold to equipment OEMs, but Parts Express now makes these boards available to the general public, allowing you to create a high-quality hifi stereo amplifier with minimal soldering and the assistance of your 3D printer. A print bed of at least 200mm x 150mm is required. I needed a compact yet powerful and high-quality stereo amplifier for an installation I was working on and remembered that these modules are now available to purchase. The ICEpower modules do not require heat sinks nor a grounded chassis (the board includes the AC power supply, which is double-insulated), making a 3D-printed enclosure the obvious choice. This arrangement printed perfectly first time using some connectors I already had on hand. For this post, I modified the audio connector mounting hole sizes to accommodate more easily sourced parts. The enclosure consists of a bottom part and a top part, both well-ventilated. The board is secured into the bottom using four sheet metal or self-tapping screws. There is also an STL file for plastic feet that can be installed with the same type of screws (rubber feet from a hardware store could be used instead if you prefer something with more friction). The top part attaches to the bottom using four of the same type of screws. Here's the parts list for the amplifier: A) The amp board is Parts Express #326-212. B) The input connectors are PE #091-1120 (one set needed). C) The output binding posts are PE #320-3375 (one set needed). D) The IEC AC power connector is 090-442. E) Wiring can be bought as a wiring harness kit PE #326-150 (one needed). F) Assembly screws are #6 x 3/8" sheet metal screws (12 needed) [metric: M3 or M3.5x10]. G) #4-40 x 3/4" screws, lockwashers, nuts. (Two sets) [metric: M3 x 15mm]. For the build shown, I used connectors on hand rather than those in the parts list (I've also included the STL file for the case version with holes for mounting those in case that works better for you). The input connectors in that version were CMC 816U, and the output binding posts were larger ones that mount on a 13mm hole. I modified that file to use more easily obtained connectors to create the suggested bottom part file. This is a pretty simple print and would likely be okay without supports (though I used supports when I printed). Also, it's a straightforward assembly process that takes just a few minutes to drive in some screws and maybe half an hour to cut, strip, and attach the ends of the wiring harnesses to the connectors. The amp works great and has plenty of quiet, clean power for most high-fidelity loudspeakers.