PURIFI PTT4.0PR Passive Radiator

The PURIFI PTT4.0PR-NF2-01 Passive Radiator is a meticulously engineered component designed to deliver deep, controlled low-frequency extension from compact enclosures. As a passive emitter, it replaces a conventional port, allowing for a smaller cabinet while maintaining impressive bass response. This makes it an ideal choice for high-fidelity loudspeaker designs, subwoofer systems, and custom audio projects where space is at a premium but performance cannot be compromised.

Technically, this passive radiator boasts a substantial maximum linear excursion (Xmax) of 14 mm and a displacement volume (Vd) of 79.8, ensuring powerful, distortion-free output. Its resonance frequency (Fs) of 24 Hz enables deep bass extension, while the mechanical Q (Qms) of 7 contributes to precise, controlled motion. The diaphragm is crafted from PURIFI’s proprietary fibre-blend material, offering exceptional stiffness and damping, and is paired with a durable rubber surround for long-term reliability. The rigid cast aluminium frame and six mounting holes ensure secure installation, with a nominal diameter of 101.6 mm and a cut-out diameter of 4.2 inches. With a depth of just 39.5 mm, this passive radiator is an excellent solution for achieving authoritative low frequencies in modern, space-efficient designs.