The Sonics AS-337A is a 4-way, 5-driver loudspeaker system from Japan, built in the 1970s. It includes a 12-inch woofer, a 1½-inch midrange cone, two 3-inch tweeters, and a super-tweeter dome. It has a hand-carved fretwork grille, open-pore oiled walnut finish, and delivers a frequency response from about 25 Hz to 22 kHz, with power handling around 100 watts and an impedance of 8 ohms.

Dimensions are approximately 15 × 25-5/8 × 11-5/8 inches (width × height × depth), and each speaker weighs about 46.2 lbs (~21 kg).