The Tekton Design 21″ Sub is a passive subwoofer from the American maker Tekton Design, built around a single 21-inch driver from the Italian company B&C. It is sold directly by Tekton and needs an external amplifier.
Key specs that matter
Rated sensitivity is 97 dB at 1 W and 1 m, and peak power handling is 3,400 W. Input is through a heavy-duty Speakon connector, the type used in professional audio for high current connections.
Engineering and use context
The price is USD 2,100 delivered, with the B&C transducer alone accounting for around USD 1,000 of that figure. The design targets large systems where high output at the bottom of the range matters.
Alternatives
For a smaller footprint Tekton Design also offers the sealed 2-10 Sub.