What is the recommended ported (bass reflex) box volume for Scan-Speak 30W/4558T00?

According to electroacoustic alignment calculations, Scan-Speak 30W/4558T00 performs optimally in a 112.3 liter vented enclosure tuned to 19.9 Hz, reaching an F3 cutoff of approximately 21.0 Hz.

Can Scan-Speak 30W/4558T00 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 50.8 liters with a Qtc of 0.707, the system exhibits an F3 of 38.4 Hz with tight transient response and natural roll-off.

What port dimensions should be used for Scan-Speak 30W/4558T00 to avoid port chuffing?

To keep vent air velocity below turbulence limits at rated power, a minimum port diameter of 7.5 cm with a length of 24.4 cm is recommended.

Sealed Specialist

Scan-Speak 30W/4558T00

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

349.95 EUR

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Recommended Bass Reflex (Vented)

OPTIMIZED EXTENSION

Net Box Volume (Vb)	112.3 Liters
Tuning Frequency (Fb)	19.9 Hz
F3 (-3 dB Cutoff)	21.0 Hz
F6 / F10 Extension	18.2 Hz / 15.8 Hz
Port Inner Diameter	Ø 7.5 cm
Port Physical Length	24.4 cm
First Pipe Resonance	704.0 Hz
Estimated MOL @ F3	105.0 dB SPL

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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING

Net Box Volume (Vb)	50.8 Liters
System Q (Qtc)	0.707 (Butterworth Q=0.707)
System Resonance (Fc)	36.9 Hz
F3 (-3 dB Cutoff)	38.4 Hz
F6 / F10 Extension	28.7 Hz / 21.6 Hz
Air Spring Linearity	High (Zero port compression)

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Verified Thiele/Small Parameters

Resonance (Fs)	17.0 Hz
Total Q (Qts)	0.32
Electrical Q (Qes)	0.342
Mechanical Q (Qms)	5.01

Equivalent Volume (Vas)	197.0 Liters
Diaphragm Area (Sd)	466.0 cm²
DC Resistance (Re)	2.6 Ω
Efficiency Bandwidth Product (EBP)	49.7

Linear Excursion (Xmax)	12.5 mm
Thermal Power (Pe)	150.0 W
Nominal Diameter	11.0"
Catalog Source	Manufacturer Official Datasheet

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[b]Scan-Speak 30W/4558T00[/b] — 112.3L Bass Reflex tuned to 19.9Hz (F3: 21.0Hz). Designed with [url=https://loadforge.io]Load Forge[/url].

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