Dayton Audio DS175-PR 6-1/2 Inch Designer Series Passive Radiator for Enclosures

Overview

The Dayton Audio DS175-PR 6-1/2 inch passive radiator is a versatile component designed to help you achieve deeper bass in compact enclosures. It works well with active drivers from 3 to 6.5 inches and includes a built-in mass disc plus an M5 threaded hole for optional weights, allowing tuning adjustments without enlarging the cabinet. The passive radiator is designed to complement the Designer Series look and feel, offering a cohesive aesthetic for upgrades or new builds.

Crafted to endure regular use, the radiator features a poly coated paper cone and a medium‑roll rubber surround. A rugged stamped frame with a rear spider provides stability during excursion, helping maintain controlled motion when the system is driven. The combination of materials and geometry is intended to balance durability with consistent performance across a range of listening levels.

Key benefits at a glance

• Lower tuning frequencies in compact enclosures for deeper perceived bass
• Long-throw suspension supports clean, linear excursion
• Rugged stamped frame with rear spider for stable operation
• Durable coated paper cone and rubber surround for longevity
• M5 threaded hole and included mass for straightforward tuning adjustments

Design flexibility and practical uses

Ideal for both replacement drivers and new constructions, the DS175-PR pairs with active drivers sized from 3 to 6.5 inches. For 6.5 inch active drivers, dual passive radiators are often recommended to balance air movement and extend low-end output. In single radiator setups, designers may opt for a passive element larger than the active woofer to maintain proportional motion.

The device provides a straightforward tuning path: add mass to the passive radiator to adjust Fs and Qms, enabling experimentation with enclosure volume and alignment. With a resonant frequency around 24.5 Hz and a Vas near 27.1 liters, the DS175-PR helps achieve a more flexible low-frequency response without resorting to larger cabinets. This makes it a practical choice for compact multi‑driver enclosures, small subwoofer projects, or floorstanding two‑ways that require a careful balance of size and bass extension.

Specs at a glance and handling tips

Fs 24.5 Hz, Vas 27.1 liters, Qms 5.57, Cms 1.15 mm/N, Xmax 8 mm, Sd 128.7 cm², overall diameter 176.28 mm, depth 47.75 mm. The included mass disc and M5 threaded hole simplify the process of tailoring the system to your enclosure and listening room.

Installation guidance

Plan for a straightforward physical fit in compatible enclosures and follow the general rule of matching the passive radiators to move roughly double the air volume of the active woofer or sub to achieve balanced performance. The DS175-PR is designed to integrate smoothly with the Designer Series line for a cohesive build quality.