15" Active Sub, stand alone
Sub Bass Extention Unit
15" Active Sub, stand alone Front Firing
15" Active Sub, Front Firing
12" Active Sub Bass Monitor
12" Active Sub Bass Monitor soffit mount
Active Subwoofer
SAM DSP Active Studio Subwoofer
Subwoofer for LS1 (stereo set)
Motion Feedback Subwoofer
Bass Extension for A226-MAIN
Active Velocity Acoustic Absorber
Optional LFE Module for A225-Ms