Difuzor Peerless by Tymphany SDS-P830878

A useful alternative to overlong ports, passive radiators like the Peerless by Tymphany 830878 offer designers a well-proven method of extending and enhancing bass response HighlightsCoated paper cone with rubber surroundLow resonance frequency for deepest possible bassCosmetic surface mount steel frame matches Peerless SDS seriesStraight-sided frame fits into narrow enclosures and permits tight spacingCompatible with small woofers by Peerless and others Product DetailsPeerless by Tymphany SDS-P830878 3-1/2 Passive Radiator This 4 inch member of the SDS family is a passive radiator, designed to match up with SDS subwoofers, and features a coated paper cone with rubber surround, and a narrow-profile steel basket shaped to fit into narrow cabinets.