American Musical Supply has the QSC HPR151i Powered PA Subwoofer for $949 after applying the $150 mail in rebate. Strong enough for a man, but she likes it too!

Quickie specs:

• Configuration : 15" powered loudspeaker
• Transducers : 15" cone transducer with 3" voice coil
• Frequency Response (-3 dB) 1 : 51 Hz - 105 Hz
• Frequency Range (-10 dB) 1 : 43 Hz - 145 Hz
• Nominal Coverage, -6 dB : 90° x 40°
• Maximum SPL (1 meter) : 133 dB peak
• Power output : 400W Class H,
• Input impedance : 22k balanced, 11k unbalanced
• Controls : Gain, Front LED On/Off, Power, Circuit breaker, Phase
• Indicators :Power, Signal, Limit
• Cooling : Convection
• Amplifier protection : Thermal and Output Limiting, Output Short Circuit, Overtemperature Muting, Driver DC Protection
• Current consumption at 120 VAC : (1/8 power EIA noise) 2.2A
• Enclosure : Painted Birch plywood
  
• Connectors : Balanced female XLR line level input x 2 (L+R), Balanced male XLR full range line level throughputs x 2 (L+R), Male XLR low-cut line level outputs x 2 (L+R)
• Dimensions : 25" H x 22" W x 20.75" D (635mm x 559mm x 525mm)
• Net weight : 98 lbs. / 44.5 kg