Does kenwood make a dual voice coil tornado kenwood, i have two in a custom box(made my rspeed, i'm still getting complements on it), and i'm going to get one more, if they don't, what sub should i get, or sould i get all new subs, i don't want too,but if i have to i'm willing to, to make my system sound good. Also what amp should i use to power the three speakers.

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191(3.1)V6 1992 Pontiac Firebird,K&N drop in filter, bosch patinum spark plugs, Pioneer reciver, kenwood 4x6's, sony xplod 6x9's, two kenwood tornado 12's with a 300 watt jenson running them, check it out at www.geocities.com/my_92firebird