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Custom Ported Sub Box Enclosure for 2 12" JBL W12GTi MkII Subwoofers ~ 4.5 CFのeBay公認海外通販|セカイモン
JBL GT-12BP Loaded Car Audio Bandpass Subwoofer Box, Black, 12-in | Canadian Tire
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Amazon.com: JBL SUBBP12AM - 450 Watts (150W RMS) 12” Amplified 12 in. Ported Subwoofer with Sub Level Control and Distortion Free Bass with Gravity Magnet Phone Holder Bundle : Electronics