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Amazon.com: Pair of SoundXtreme 12 Inch 2000 Watt Car Audio Subwoofer with DVC Power - Total of 2 Subwoofers Combo of 4000 Watts Handling Power Frequency Response: 30 - 2.5kHz : Electronics
Promounts 30-Watt Subwoofer Speaker in the Speakers department at Lowes.com
HEDD BASS 08 300-Watt 8" Subwoofer with DSP #30-100115 (Used) - Vintage King
Cyber Acoustics 30 Watt Powered Speakers with Subwoofer for PC and Gaming Systems in Frustration Free Packaging, (CA-3602FFP) (223194b748c9d7e1efc397fd4812e6e7) - PCPartPicker
BARRY JOHN 4 Inch subwoofer Speaker 4 ohm 30 Watt HiFi Woofer Deep Bass for Home Theater (Pack of 2) Price: Buy BARRY JOHN 4 Inch subwoofer Speaker 4 ohm 30 Watt
Celestion H5-1016 T5159/M home audio desktop 5 inch speaker 8 ohm 30 watt – ASA College: Florida