Spring Reverb

Materials: Item Quantity Price Speaker Amplifier 1 $4.89 Speaker Driver 1 $2.95 Slinky 1 $12 Tube 1 $16.85 Piezo Sensor 1 $9.88 Audio jack 1 $19.97 Foam board Enough to cut 3 circles slightly larger than the tube opening $6.82 Tools: Soldering set up (including iron,...