The Spark John Kovac's Harps WMRA | By Martha Woodroof Published November 9, 2012 at 11:23 AM EST Facebook Twitter LinkedIn Email Listen • 16:34 1 of 3 2 of 3 3 of 3 On The Spark from WMRA: John Kovac plays the harp and makes them as well --sometimes out of surprising materials. John's workshop is in Front Royal, Va.