they arent rare, most tc sounds subs dont have much info because they are no longer made. no more db-500's, nore more tc-2000's, no more tc-3000 and no more tc 5200's. someone was selling a pair of the 15" tc2000's a while back, and someoe was selling a single 4 ohm 12" tc2000.
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IF YOUR INTERESTED IN A DESIGN I CAN FINALLY DO THEM AGAIN...after a long, long wait. PM if you want one.
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