Amazon.com has an Advent ASW1200 12″ 100 Watt RMS Subwoofer for $79.99 with Free Shipping.
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- Measures 15.4 x 18 x 16.5 inches (W x H x D); 5-year warranty n
- 100-watt RMS powered subwoofer with 33 to 150 Hz frequency response (+/-3 dB) n
- Adds dramatic, powerful audio to 5.1- and 6.1-channel soundtracks n
- Down-firing, long-throw 12-inch woofer enables deep, rich bass n
- Variable crossover lets user tailor sub’s output to match other speakers