Why do 2Wq subwoofers connect to the speaker level signal rather than the line level signal like other subwoofers?
The Vandersteen subwoofer interface is unique. A first-order, passive high-pass filter is placed in front of the main amplifier. The subwoofer samples the output from the filtered main amplifier and corrects for the roll-off that has been introduced. This is the only way to provide a true, first-order blend between the subwoofer and the main speakers that is transparent and seamless. A passive high-pass filter is as transparent as the input coupling capacitor that is probably present in the amplifier already and may actually improve the sound of direct-coupled amplifiers that use servo circuits instead. Sampling the output of the main amplifier passes along to the subwoofer the sound and propagation speed of the amplifier that drives the main speakers for a seamless blend between the two. For additional explanation read the Audio Perfectionist review of the 2Wq. You can find it in the Reviews section of our website.
