Ground Zero Radioactive SPL-enclosures were the most sold loaded enclosures on the market. Unbetable performance in their price class made these boxes legendary. All new Ground Zero GZRB 16SPL is delivering that unbeatable performance in a size that is never seen before. This enclosure is so small that it is really hard to find a car that is too small to have it installed in. Excellent choice to vans and pickups, put it under the seat or behind the seat. Even in smallest passenger cars, this enclosure takes only a fraction of the trunk space.