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Product PRT-09319 | about 2 years ago

Jeremy1998: I am going to modify this in Eagle so that one side is 3.3V and one side is 5V… I think that that sould be like V2 or something…
I agree. It’s trivial to use jumper wire to copy a voltage to the 2nd rail. It’s more useful to have both voltages available from a single power jack.

Product PRT-08872 | about 3 years ago

I’m pretty sure this board has a design flaw such that the inner and outer conductors of the RCA jack are shorted. I alerted SparkFun, and they are supposedly working on a fix.
The board still works using the .1" spaced Out+ and Out- signals (don’t solder the RCA jack).
Also, I found that it operates pretty well on Li-ion voltage.
The BOB-08669 is smaller but amplifies high frequencies too much. This board (even at 3.7 v) has better balance.

Product PRT-08886 | about 3 years ago

Note that the edge and borders of this board are metal, forming a single conductor top to bottom and around.
I find it rather inconvenient having to worry about shorting bare leads and wires.