circuit board is 2.75 x 1.25 inches and less than an inch thick fully
populated.
+<a href="usbclassd-v0.1.jpg"> <img src="usbclassd-v0.1-thumb.jpg"></a>
+
A set of these boards, one per
"zone", each attach to the speaker wires, a DC power supply, and a USB hub
that is attached to a Debian system in the mech room.