Dayton Audio DMA70-PR 2-1/2" Aluminum Cone Passive Radiator

The Dayton Audio DMA70-PR 2-1/2" Aluminium Cone Passive Radiator is a sophisticated solution for enhancing low-frequency output in compact audio systems. Unlike traditional ports, this passive radiator requires no amplifier power, making it an ideal upgrade for small bookshelf speakers, portable Bluetooth enclosures, or custom DIY projects where space is at a premium. By replacing a port tube, it eliminates chuffing noises and allows for deeper, more controlled bass extension in sealed or vented designs.

Engineered with a rigid aluminium cone, the DMA70-PR offers excellent stiffness-to-mass ratio, ensuring accurate piston-like motion and reduced distortion. Its resonance frequency of 34.5 Hz and a substantial 7 mm linear excursion (Xmax) enable impressive low-end performance from a compact footprint. The passive radiator features a 64 mm cut-out diameter, four mounting holes, and a total depth of just 43.9 mm, simplifying integration into tight enclosures. With a mechanical Q (Qms) of 3.86 and a moving mass of 12 grams, this driver is precisely tuned for seamless synergy with active woofers in the Dayton Audio DMA series.

Whether you are refining a high-fidelity stereo pair or maximising output from a miniature subwoofer system, the DMA70-PR delivers authoritative, clean bass without the complexity of additional amplification. Its robust construction and thoughtful engineering make it a reliable choice for audiophiles and hobbyists alike.