[1][3] The Sonic 23 is a small recreational keelboat, built predominantly of fibreglass, with wood trim.

It has a masthead sloop rig, a transom-hung rudder and a fixed fin keel.

[2][3] In a review Michael McGoldrick wrote, "Many people regard the Sonic as a close approximation of the very popular Tanzer 22, and the hull and sail plan of these two boats are believed to be very similar.

However, the Sonic 23 was designed from scratch by Joseph D'Alessio, and it comes with a sightly larger cabin with a better layout.

The Sonic's interior room may give it the edge over the Tanzer 22 which is known for being a good sailing boat, but which suffers from cabin which appears a little cramped.