Testing Your Home Theater Subwoofer - Is It Working? | AV Gadgets
Best Buy: REL Reference Series 15" 1000W Powered Subwoofer Piano Black Lacquer NO.25
Gigabass Thunder x400 active subwoofer bass test | Gigabass Thunder X400 Active Subwoofer Bass & Frequency Response Test! The Subwoofer can respond from 20hz at -10db, however, from 30hz you will get