QTX 15 Inch Active Subwoofers 600 Watts. One of sub need a knob clean as make a noise when adj volume otherwise very good condition. The item “2x QTX 15 Inch Active Subwoofers 600 Watts” is in sale since Friday, March 13, 2020. This item is in the category “Sound & Vision\Performance & DJ Equipment\Speakers & Monitors”. The seller is “danio969″ and is located in Swansea. This item can’t be shipped, the buyer must pick up the item.