The ci140sub employs the same four bass drive units used in the ci140 and operates with the ATL, reproducing additional low-frequency energy, making it perfect for home theatre installations. This dedicated and identically sized sub complements the ci140, positioning it as an apex choice for on-wall home theatre performance. Its use of the ATL ensures the sub can handle additional low frequencies, making it ideal for full-frequency music reproduction not only in high-end home audio setups but also in professional studio environments.