GTI series,car woofers. what Pro or home drivers are the smaller drivers based on?
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File:JBL 1200GTI DSC9561FP.jpg - Wikimedia Commons
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W10GTi MKII - JBL 10" 3000 Watts Competition Subwoofer
JBL W10GTI Subwoofers user reviews : 2.4 out of 5 - 3 reviews - carreview.com
4000W JBL GTI 12" Subwoofer + NVX Sound Dampening Sheets
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