What is the recommended ported (bass reflex) box volume for SB Acoustics MR16TX-8?

According to electroacoustic alignment calculations, SB Acoustics MR16TX-8 performs optimally in a 20.2 liter vented enclosure tuned to 42.2 Hz, reaching an F3 cutoff of approximately 43.9 Hz.

Can SB Acoustics MR16TX-8 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 9.3 liters with a Qtc of 0.707, the system exhibits an F3 of 79.2 Hz with tight transient response and natural roll-off.

What port dimensions should be used for SB Acoustics MR16TX-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 12.8 cm is recommended.

Reflex Optimized

SB Acoustics MR16TX-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

329.95 EUR

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Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	20.2 Liters
Tuning Frequency (Fb)	42.2 Hz
F3 (-3 dB Cutoff)	43.9 Hz
F6 / F10 Extension	38.3 Hz / 33.3 Hz
Port Inner Diameter	Ø 5.0 cm
Port Physical Length	12.8 cm
First Pipe Resonance	1345.0 Hz
Estimated MOL @ F3	100.2 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	9.3 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	77.4 Hz
F3 (-3 dB Cutoff)	79.2 Hz
F6 / F10 Extension	59.4 Hz / 44.6 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	35.0 Hz
Total Q (Qts)	0.31
Electrical Q (Qes)	0.326
Mechanical Q (Qms)	6.47

Equivalent Volume (Vas)	38.9 Liters
Diaphragm Area (Sd)	117.0 cm²
DC Resistance (Re)	6.2 Ω
Efficiency Bandwidth Product (EBP)	107.5

Linear Excursion (Xmax)	5.7 mm
Thermal Power (Pe)	30.0 W
Nominal Diameter	6.5"
Catalog Source	Manufacturer Official Datasheet

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[b]SB Acoustics MR16TX-8[/b] — 20.2L Bass Reflex tuned to 42.2Hz (F3: 43.9Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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