Connect Speaker pHAT to other speaker


Hey Guy’s and Girls

Today I’ve got my Raspberry Pi zero and my Speaker pHAT.
Together with my 1x 3" Speaker 4Ω (5W)…
It’s for my vintage portable radio that was broken so I wanted to make A vintage Pi (portable) radio.

So now I’m wondering how to connect the Speaker pHAT to the other speaker.
Not the small one that’s in the delivery but an other one.
I asume I can just connect the speaker to the pHAT with some soldering.
But can somebody please tell me + and -?

I’ve got the mounting article over here:


It shouldn’t really matter which way you connect it up, with a single speaker. If you had two speakers and wired them up in opposite polarities then I think you might have phase problems, but in your case it shouldn’t make any difference.


O great! So the + and - doesn’t mather for this project?
Where i connect the red and the black side.
That would be great…
Somebody said that I had to figure out where the + side is on the Phat board and what the - side was…
Could not figure it out…


Nope, it shouldn’t matter… connect them whichever way you want!


Hi Sandy,

just a question that fits in this topic. I wanted to use 2x 3W (4Ohms) Speakers with the speaker phat. This adds up to to 6W. Up to how much power can be safely drawn from the speaker phat without having issues with heat or power draw? How should I connect the speakers for the max. output? Thanks in advance.