You will not find a cleaner sounding sub than the Velodynes. I have a F1500 and it is excellent. Servo-controlled for ultra-low distortion. Do not use the internal filters, though. They are not high-quality.
Some have complained about lack of impact with the Velodynes with movies. I solved this by doubling the amount of filter caps in the power supply and put a heavy power cord on it. No lack of impact now. It also dissappears - cannot tell where it is located when it is in the sweet-spot.
Some have complained about lack of impact with the Velodynes with movies. I solved this by doubling the amount of filter caps in the power supply and put a heavy power cord on it. No lack of impact now. It also dissappears - cannot tell where it is located when it is in the sweet-spot.