Passive radiators allow lower tuning in smaller enclosures than is possible with standard ports. You can get that extra low end output without all the problems with vent noise and compression associated with ports.
The PR15-1400 is our 15" 1400 gram passive radiator. The diaphragm is made from 3/4" thick solid MDF with 350grams of mass added. The suspension can support additional mass, up to 1800grams total.
It is used in many of our systems, including the TH12 alignment.
