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Dayton Audio DSA215-PR 8″ Designer Series Aluminum Cone Passive Radiator

The Dayton Audio Designer Series passive radiators are excellent general-purpose passives suitable for replacement or for new construction. A built-in mass disc offers a good starting point for most designs, and a convenient M5 threaded hole (screw included) allows different types of weights to be added if desired. Cosmetically and mechanically, these passives match Dayton Audio’s Designer Series drives, with a black anodized aluminum cone and medium-roll rubber surround for clean excursion and long life. The possibilities with these passives are endless, from stand mount two-ways to compact subwoofer systems.

Specifications: • Fs: 25.6 Hz • Vas: 1.3 ft³ • Qms: 7.66 • Cms: 0.58 mm/N • Rms: 1.4 kg/s • Mms: 67 g • Sd: 211.2 sq. cm. • Xmax: 11 mm • Dimensions: Overall diameter: 8.50″, Cutout diameter: 7.01″, Depth: 2.30″.

Note: Adding mass to the passive radiator will decrease Fs and increase Qms.

Tip: As a general rule, the passive radiator(s) should have at least double the displacement of air (Vd) as the active woofer(s)/subwoofer(s) in the system.
To calculate Vd: Sd x Xmax = Vd

Product Details

Brand Dayton Audio
Model DSA215-PR
Part Number 295-549
UPC 848791005060
Unit of Measure Each
Weight 1.15
Product Specifications

Nominal Diameter 8″
Bolt Circle Diameter 8.11
Thiele-Small Parameters

Resonant Frequency (Fs) 25.6Hz
Mechanical Q (Qms) 7.66
Compliance Equivalent Volume (Vas) 1.3ft³
Mechanical Compliance of Suspension (Cms) 0.58mm/N
Diaphragm Mass Inc. Airload (Mms) 67g
Maximum Linear Excursion (Xmax) 11mm
Surface Area of Cone (Sd) 211.2cm²
Materials of Construction

Cone Material Aluminum
Surround Material Rubber
Basket / Frame Material Steel
Mounting Information

Overall Outside Diameter 8.50″
Baffle Cutout Diameter 7.01″
Depth 2.3″
# Mounting Holes 5