Peerless by Tymphany SDS-135F25CP02-04 5-1/4" Paper Cone Woofer

The Peerless by Tymphany SDS-135F25CP02-04 is a 5-1/4" paper cone woofer engineered to deliver deep, controlled bass with exceptional clarity. As part of the renowned SDS series, this driver is ideal for audiophiles and DIY enthusiasts seeking to elevate compact speaker designs, from bookshelf monitors to small subwoofer systems. Its paper cone construction ensures a natural, warm tonal character that integrates seamlessly with mid-range drivers, making it a versatile choice for two-way or multi-way loudspeaker projects.

Technically, this woofer features a 133.4mm nominal diameter with a mounting cutout of 124mm and a screw circle diameter of 141.6mm, requiring six mounting holes for secure installation. The 12.5mm linear excursion (Xmax) enables impressive bass extension, while the 87dB sensitivity (SPL 1m/2.83V) ensures efficient power handling. With a total Q factor (Qts) of 0.4, it is well-suited for sealed or ported enclosures, offering a balanced blend of transient response and low-frequency output. The 3.1-ohm DC resistance and 1.06mH voice coil inductance contribute to stable performance, while the 73.4mm mounting depth allows integration into slim cabinets. Whether for upgrading existing speakers or building custom designs, this woofer delivers authoritative, articulate bass that enhances any listening experience.