Custom Stone Speaker Bases/Stands Order Form Available - Audio Isolation Stands Set of 2 / Quartz Speaker Bases / Audio Equipment Isolation Stands - 18-3/4”x16-3/4”x1 1/8” $177.77 Set of 2 / Granite Speaker Bases / Audio Equipment Isolation Stands - 10"x14"x1 1/8" $177.77 Set of 2 / Quartz Speaker Bases / Audio Equipment Isolation Stands - 18”x12”x1 1/8” $177.77