What is the recommended ported (bass reflex) box volume for Dayton Audio PM220-8?

According to electroacoustic alignment calculations, Dayton Audio PM220-8 performs optimally in a 58.8 liter vented enclosure tuned to 49.3 Hz, reaching an F3 cutoff of approximately 46.5 Hz.

Can Dayton Audio PM220-8 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 25.6 liters with a Qtc of 0.707, the system exhibits an F3 of 85.0 Hz with tight transient response and natural roll-off.

What port dimensions should be used for Dayton Audio PM220-8 to avoid port chuffing?

To keep vent air velocity below turbulence limits at rated power, a minimum port diameter of 5.0 cm with a length of 0.5 cm is recommended.

Reflex Optimized

Dayton Audio PM220-8

Complete Thiele/Small parameters, optimized ported (bass reflex) and sealed enclosure designs, F3/F6/F10 cutoffs, and vent turbulence analysis calculated by Load Forge.

Estimated Retail

139.98 USD

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Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	58.8 Liters
Tuning Frequency (Fb)	49.3 Hz
F3 (-3 dB Cutoff)	46.5 Hz
F6 / F10 Extension	41.9 Hz / 37.2 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	0.5 cm
First Pipe Resonance	31660.0 Hz
Estimated MOL @ F3	106.6 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	25.6 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	85.6 Hz
F3 (-3 dB Cutoff)	85.0 Hz
F6 / F10 Extension	63.9 Hz / 48.0 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	49.1 Hz
Total Q (Qts)	0.38
Electrical Q (Qes)	0.411
Mechanical Q (Qms)	5.08

Equivalent Volume (Vas)	63.0 Liters
Diaphragm Area (Sd)	205.3 cm²
DC Resistance (Re)	6.5 Ω
Efficiency Bandwidth Product (EBP)	119.5

Linear Excursion (Xmax)	4.6 mm
Thermal Power (Pe)	40.0 W
Nominal Diameter	8.0"
Catalog Source	Manufacturer Official Datasheet

Shareable Acoustic Card for Forums & Social Media

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[url=https://loadforge.io/drivers/dayton-audio-pm220-8][img]https://loadforge.io/api/v1/card/dayton-audio-pm220-8.svg[/img][/url]
[b]Dayton Audio PM220-8[/b] — 58.8L Bass Reflex tuned to 49.3Hz (F3: 46.5Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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