Spruce has long been a popular choice of wood for the tops of guitars and mandolins. It is only recently that it has started being widely used for ukuleles such as in this range by Kala. But it's a good choice of wood for certain types of player. The tone it produces is very immediate and punchy (conversely it doesn't have a rounded, rich tone) which makes it great for players who really like to play loud and hard.
HaileISela performs a song using his Kala Solid Spruce Top KA-SC Ukulele.
Kala KA SC Concert Ukulele
On eBay UK
Construction: Solid Spruce top, Mahogany (laminated) back and sides
Tuners: Chrome die-cast sealed geared tuners