Commodity Description easy and compact powerful but, PM-SUBmini corresponded to the PM series active speakers, the subwoofer can taste the bass full of powerful and realistic. The voice coil is an engine part of the speaker adopted a favorable four-layer winding to play the bass, where the diaphragm to convey the generated sound I have been using a glass fiber, which boasts a large high rigidity mesh. Moreover, it has a structure of a closed type without the bass reflex duct to realize bass with speedy, even is realized sound of warm sound wooden body. connection is simple, also set freely PM-SUBmini settings and connection method is simple. To use in combination with the PM series of speakers, just connect with RCA pin cable that comes with this product. Also, if you are gone cancel each other a sound subwoofer and other speakers can also be adjusted with PHASE switch.