The S57i can be mounted in-ceiling, or in-wall. It is a rare example of a custom-centric design that offers competitive results versus the finest freestanding options. The S57i is a strong performer, featuring the quickness and tonality all our RTL subwoofers are known for, with bass extension to 25Hz. 

The Regenerative Transmission Line®

Regenerative Transmission Line® designs yielded the unique combination of high sensitivity, high output, and low distortion with the uniform and extended response we required. The result is extraordinary power and punch combined with a remarkable level of quickness, tunefulness, and realism.