The other amp outputs to a passive horn speaker with the input being a warning sound audio file

I used mine to make a portable speaker

The board plays a raw speaker great, but I can't get it to power a string of LEDs off the same voltage

Used for portable speaker, easy to hookup, highly recommend.

Both are receiving sound from old iPods and outputting to passive speakers

Made portable speakers out of them and they are way cheaper and louder than retail portable speakers for sure

These speakers are shielded - they don't interfere with your arduino or raspberry pi or any other controller etc

5/18/16: I have now been using this for a few months on a set of passive 8 Ohm speakers typically found in a car stereo setup

Bought for a ammo can project and right speaker output does not work

Little disappointed in the quality though, the solder joints for the potentiometer(3 front pins) and right speaker output connector were

I split the two speakers and hooked them up left-right to this amp

Used it in a briefcase portable bar/speaker system.

Handed the input and load quite well - the heatsink does a great job as