Don't let the budget-friendly nature fool you; the B119 still needs clean power. An amplifier capable of delivering a solid 300 Watts RMS at 4 Ohms is the sweet spot. Under-powering a subwoofer can be just as dangerous as overpowering it, leading to "clipping" that damages the voice coil.
Sometimes repurposed as a subwoofer for small PA setups due to its low-frequency extension. cerwin vega b119