What is the recommended ported (bass reflex) box volume for B&C Speakers 5FG44 16Ω?

According to electroacoustic alignment calculations, B&C Speakers 5FG44 16Ω performs optimally in a 5.1 liter vented enclosure tuned to 68.6 Hz, reaching an F3 cutoff of approximately 66.6 Hz.

Can B&C Speakers 5FG44 16Ω be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 2.2 liters with a Qtc of 0.707, the system exhibits an F3 of 115.6 Hz with tight transient response and natural roll-off.

What port dimensions should be used for B&C Speakers 5FG44 16Ω 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 20.9 cm is recommended.

Reflex Optimized

B&C Speakers 5FG44 16Ω

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

95.25 EUR

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⚠️ Engineering Notice for Builders

Limited linear excursion (Xmax: 3.0 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.

Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	5.1 Liters
Tuning Frequency (Fb)	68.6 Hz
F3 (-3 dB Cutoff)	66.6 Hz
F6 / F10 Extension	58.8 Hz / 51.6 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	20.9 cm
First Pipe Resonance	821.0 Hz
Estimated MOL @ F3	104.8 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	2.2 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	124.6 Hz
F3 (-3 dB Cutoff)	115.6 Hz
F6 / F10 Extension	90.2 Hz / 69.3 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	70.0 Hz
Total Q (Qts)	0.39
Electrical Q (Qes)	0.405
Mechanical Q (Qms)	10.5

Equivalent Volume (Vas)	5.1 Liters
Diaphragm Area (Sd)	92.0 cm²
DC Resistance (Re)	11.1 Ω
Efficiency Bandwidth Product (EBP)	172.8

Linear Excursion (Xmax)	3.0 mm
Thermal Power (Pe)	100.0 W
Nominal Diameter	5.0"
Catalog Source	Manufacturer Official Datasheet

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[b]B&C Speakers 5FG44 16Ω[/b] — 5.1L Bass Reflex tuned to 68.6Hz (F3: 66.6Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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