A shop owner/client asked about a passive amp for his iPhone. He likes to watch Netflix movies between customers. I made a variation on Steve's passive amp, then kept iterating with suggestions from the buyer. These are the current design in Bulletwood, Red Oak, and Black Walnut. The base is cut to a 30 degree angle so the phone screen and sound hole face square to a person sitting in a chair in front of a desk. The phone shown is my Droid. It's speakers are to the rear rather than bottom as in the iPhone, but it works great as well.
These are made in 3 layers, with a 3/4" thick solid back, the center 3/4" thick with a 2.5" sound cavity and sound path cut on the scroll saw, and the front 1/4" thick with a 1.625" sound hole cut with a Forstner Bit. They are glued together, then the 30 deg angle wedge is cut from the bottom and glued to the back for stability. Finished with Howard's Feed N Wax. Overall is 3.5"H x 8"W x about 3" deep.
BTW - the Droid is showing Glenn Close in "Damages" - she's one scary woman.
