What is the recommended ported (bass reflex) box volume for Dayton Audio PM180-8?

According to electroacoustic alignment calculations, Dayton Audio PM180-8 performs optimally in a 10.9 liter vented enclosure tuned to 70.3 Hz, reaching an F3 cutoff of approximately 72.0 Hz.

Can Dayton Audio PM180-8 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 5.2 liters with a Qtc of 0.707, the system exhibits an F3 of 119.4 Hz with tight transient response and natural roll-off.

What port dimensions should be used for Dayton Audio PM180-8 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 7.4 cm is recommended.

Reflex Optimized

Dayton Audio PM180-8

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

112.00 EUR

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Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	10.9 Liters
Tuning Frequency (Fb)	70.3 Hz
F3 (-3 dB Cutoff)	72.0 Hz
F6 / F10 Extension	63.5 Hz / 55.3 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	7.4 cm
First Pipe Resonance	2340.0 Hz
Estimated MOL @ F3	103.8 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	5.2 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	128.5 Hz
F3 (-3 dB Cutoff)	119.4 Hz
F6 / F10 Extension	91.3 Hz / 68.9 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	53.2 Hz
Total Q (Qts)	0.28
Electrical Q (Qes)	0.3
Mechanical Q (Qms)	4.13

Equivalent Volume (Vas)	28.0 Liters
Diaphragm Area (Sd)	130.7 cm²
DC Resistance (Re)	6.4 Ω
Efficiency Bandwidth Product (EBP)	177.1

Linear Excursion (Xmax)	4.6 mm
Thermal Power (Pe)	30.0 W
Nominal Diameter	6.5"
Catalog Source	Manufacturer Official Datasheet

Shareable Acoustic Card for Forums & Social Media

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[url=https://loadforge.io/drivers/dayton-audio-pm180-8][img]https://loadforge.io/api/v1/card/dayton-audio-pm180-8.svg[/img][/url]
[b]Dayton Audio PM180-8[/b] — 10.9L Bass Reflex tuned to 70.3Hz (F3: 72.0Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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