Vented Specialist

SB Audience 6MW151D

Best box: 5.0 L bass reflex tuned to 77.3 Hz · F3 79.6 Hz

Predicted SPL response of the SB Audience 6MW151D in the recommended 5.0 L bass reflex box versus the alternative — open it in the simulator Open and tweak this box live ↗

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Recommended Bass Reflex (Vented)

PORT BUILDABLE
Net Box Volume (Vb) 5.0 Liters
Tuning Frequency (Fb) 77.3 Hz
F3 (-3 dB Cutoff) 79.6 Hz
F6 / F10 Extension 69.6 Hz / 60.6 Hz
Port Inner Diameter Ø 6.8 cm
Port Physical Length 31.6 cm
First Pipe Resonance 545.0 Hz
Estimated MOL @ F3 111.9 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 2.3 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 142.6 Hz
F3 (-3 dB Cutoff) 140.8 Hz
F6 / F10 Extension 107.0 Hz / 80.7 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 66.0 Hz
Total Q (Qts) 0.32
Electrical Q (Qes) 0.331
Mechanical Q (Qms) 9.24
Equivalent Volume (Vas) 8.8 Liters
Diaphragm Area (Sd) 145.3 cm²
DC Resistance (Re) 5.4 Ω
Efficiency Bandwidth Product (EBP) 199.1
Linear Excursion (Xmax) 5.2 mm
Thermal Power (Pe) 300.0 W
Nominal Diameter 6.0"
Catalog Source Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for SB Audience 6MW151D?

Load Forge's calculated alignment puts SB Audience 6MW151D in a 5.0 liter vented enclosure tuned to 77.3 Hz, reaching an F3 cutoff of approximately 79.6 Hz.

Can SB Audience 6MW151D be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 2.3 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 140.8 Hz.

What port dimensions should be used for SB Audience 6MW151D to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 31.6 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.

Shareable Acoustic Card for Forums & Social Media

Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.

SB Audience 6MW151D Enclosure Card
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