PURIFI PTT5.25PR-NA2-01 Passive Radiator

The PURIFI PTT5,25PR-NA2-01 is a 5.25-inch ultra-low-distortion passive radiator engineered to deliver deep, controlled bass extension from compact enclosures. As a dedicated passive emitter, it transforms the performance of small speaker systems by providing authoritative low-frequency output without the need for additional amplification or complex port tuning. This makes it an ideal choice for high-fidelity audio enthusiasts, custom loudspeaker builders, and professional designers seeking to achieve a clean, powerful bottom end in bookshelf speakers, subwoofer satellites, or multimedia monitors.

Technically, this passive radiator features a resonance frequency of just 21 Hz, enabling it to reproduce the deepest bass notes with remarkable ease. Its mechanical Q (Qms) of 8.3 ensures a well-damped response, while the equivalent volume (Vas) of 12 litres and suspension compliance (Cms) of 1.15 mm/N allow for flexible integration with a wide range of active drivers. The unit has a nominal diameter of 133.4 mm, a baffle cut-out diameter of 121.5 mm, and a screw circle diameter of 138 mm, with six mounting holes for secure installation. The mounting hole diameter is 4.2 mm, and the overall dimensions are 147.3 mm. With its ultra-low-distortion design, this passive radiator delivers a clean, articulate bass that enhances any high-performance audio system.