"Spetsai"s main battery consisted of three guns in individual mounts. Two guns were mounted forward in barbettes on either side of the forward superstructure; these were L/34 guns. The third gun, a L/28 gun, was placed in a turret aft. The secondary battery consisted of four L/36 guns in casemates were mounted below the forward main battery, and a fifth 5.9-inch gun was placed on the centerline on the same deck as the main battery. A number of smaller guns were carried for defense against torpedo boats. These included four L/22 guns, four 3-pounder guns, four 1-pounder guns, and six 1-pounder Hotchkiss revolver cannons. The ship was also armed with three torpedo tubes.