Vented Specialist

SEAS H0571_CB17RCYP

Best box: 12.2 L bass reflex tuned to 51.9 Hz · F3 59.5 Hz

Predicted SPL response of the SEAS H0571_CB17RCYP in the recommended 12.2 L bass reflex box versus the alternative — open it in the simulator Open and tweak this box live ↗

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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)

PORT BUILDABLE
Net Box Volume (Vb) 12.2 Liters
Tuning Frequency (Fb) 51.9 Hz
F3 (-3 dB Cutoff) 59.5 Hz
F6 / F10 Extension 50.1 Hz / 42.8 Hz
Port Inner Diameter Ø 5.0 cm
Port Physical Length 14.3 cm
First Pipe Resonance 1200.0 Hz
Estimated MOL @ F3 105.2 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 6.0 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 96.1 Hz
F3 (-3 dB Cutoff) 100.9 Hz
F6 / F10 Extension 76.3 Hz / 57.4 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 38.0 Hz
Total Q (Qts) 0.27
Electrical Q (Qes) 0.34
Mechanical Q (Qms) 1.31
Equivalent Volume (Vas) 34.9 Liters
Diaphragm Area (Sd) 125.0 cm²
DC Resistance (Re) 5.7 Ω
Efficiency Bandwidth Product (EBP) 111.7
Linear Excursion (Xmax) 3.0 mm
Thermal Power (Pe) N/A W
Nominal Diameter 6.5"
Catalog Source Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for SEAS H0571_CB17RCYP?

Load Forge's calculated alignment puts SEAS H0571_CB17RCYP in a 12.2 liter vented enclosure tuned to 51.9 Hz, reaching an F3 cutoff of approximately 59.5 Hz.

Can SEAS H0571_CB17RCYP be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 6.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 100.9 Hz.

What port dimensions should be used for SEAS H0571_CB17RCYP to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 14.3 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.

SEAS H0571_CB17RCYP Enclosure Card
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