Pearl PCJ-SBJ Sambajon, Fiberglass Shell. The surdo side of this cajon is also a great fit for a cajon pedal - it can't be damaged or cracked like a wooden frontplate, so you can dig in a little more to get some powerful bass going.

The fiberglass Pearl Sambajon features two distinct playing surfaces: a standard hardwood frontplate, plus a padded, cloth-covered side that makes a bassy sound similar to a Brazilian surdo - excellent for any cajon players out there who like to jam with samba music.