I've made a miniature stereo using a bluetooth/MP3/SD card player and an Adafruit Class D 20 watt stereo amp, powered by a 12 volt DC plug that is split between these two devices. It's controlled by a volume knob (10K Ohm Single Linear Taper Dimmer Potentiometer with on/Off Switch) to turn the device on-off and control volume. The device turns on at about 9 oclock but jumps to a fairly high volume before I even get to 12 oclock position. No low volume to speak of. I chose a 10K Ohm pot for no particular reason. Might a 1k Ohm pot give me better low volume?