Skip to main content


21” Active DSP-Amplified Subsonic Subwoofer

• Infrasonic Bass Extension – Down to 15Hz
• High performance
• High sound pressure level; 115dB in-room target
• Active amplified with integrated Digital Signal Processing EQ

Basic Specifications

• 21” driver
• 2400W outboard Amp
• 24.5”W x 42” H x 14”D

IS-21 Infrasonic Subwoofer Brochure