Amazon.com has a Skullcandy SCS-SC Crushers Stereo Headphones with Subwoofer for $34.99 with Free Shipping.
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- Frequency response: 20Hz-20kHz n
- Built in bass-amplified, vibration subwoofer system, equivelant to a 36″ subwoofer n
- Speakers are 30mm Mylar cones with two 30mm subwoofer cones to drive bass n
- Powered by one AA battery