how to open .bin files on mac?

You are confusing us. It begins with how to open a .bin file, now it is you cannot unzip a zip file. I'm assuming it is an actual .zip file with a ".zip" file extension or are you still referring to the .bin file? You do not unzip a ".bin" file as that is typically a firmware file that can only be processed by the device it is made for.

If you have an actual .zip file that needs to be opened in order to actually access the .bin file located inside, then what happens when you try to open the .zip file (exact error message)? How are you trying to open the .zip file?

.bin files are usually the firmware update file. You need a way to upload that file to the device. Most times you will need to use a special utility app from the device manufacturer to do this and most manufacturers do not provide such an app for macOS. The better device manufacturers will provide a simple multi-platform option to upload the .bin firmware file to the device, but this is very rare. Unfortunately it is a Windows' world and device manufacturers never consider providing an OS independent firmware update option.

You don't open .bin firmware files.

You can try searching online to see if the Linux community has a way to update those speakers. If the Linux community has a way, then it can probably be used (perhaps in a slightly modified way) to be done from macOS.

what files are these? what are they supposed to do for you?

then copy app.bin to an empty USB-stick as instructed and do not try to open it on your Mac.

If the file you obtained ends in .zip, double-click to open that and app.bin should be unpacked from it.

You will need a custom Klipsh Utility to open and apply such an update.

If that bin file IS the Utility, it will open in Terminal.

Are you sure you are supposed to "open" the file? Contact the speaker maker for instructions regarding how to update their firmware.

what happens when you double-click the .bin?

If that does not open a Utility, then you need to contact the vendor for additional instructions, just as BobTheFisherman said.