PW-1PW-1804X has been designed specifically for both direct radiator and horn loaded mid bass applications. This PW Series design has been optimized for use in the critical 35Hz to 1000Hz vocal range and is an ideal choice for professional level three way designs. A typical 18 inch design must offer both good bandwidth, down to 60Hz, and good efficiency. The PW-1804X has all of its performance designed into the 125Hz and above range. This means that the efficiency can be optimized for this frequency range. High efficiency means that lower electrical power levels are required, thus improving both system relia-bility and reducing power compression.