Miami Gardens, FL - DS18 is now shipping the EXL-XXB Series in 12 and 15 inch. The EXL-XXB series is brought to you by the most talented engineers in the audio industry. They were designed from the bottom up with the audio enthusiast in mind. It is our second from the top tier subwoofer on Miami Gardens, FL - DS18 is now shipping the EXL-XXB Series in 12 and 15 inch. The EXL-XXB series is brought to you by the most talented engineers in the audio industry. They were designed from the bottom up with the audio enthusiast in mind. It is our second from the top tier subwoofer on