Overview Reviews Product Description Massive Audio GT124 12" Dual 4 Ohm Subwoofer 500W RMS with Grill Massive Audio GT124 Product Videos Custom Field Product Reviews Write a Review Write a Review × Massive Audio Massive Audio GT124 12" Dual 4 Ohm Subwoofer 500W RMS with Grill Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *