Sealed Specialist

DS18 294-8076

Best box: 29.4 L bass reflex tuned to 34.0 Hz · F3 49.8 Hz

Predicted SPL response of the DS18 294-8076 in the recommended 29.4 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) 29.4 Liters
Tuning Frequency (Fb) 34.0 Hz
F3 (-3 dB Cutoff) 49.8 Hz
F6 / F10 Extension 41.7 Hz / 32.3 Hz
Port Inner Diameter Ø 7.5 cm
Port Physical Length 33.6 cm
First Pipe Resonance 512.0 Hz
Estimated MOL @ F3 110.2 dB SPL
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Sealed (Acoustic Suspension) — compromise

SUITS INFINITE / OPEN BAFFLE

With Qts 0.774 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.095; for a flat response this driver is better used on an infinite (IB) or open baffle.

Net Box Volume (Vb) 36.8 Liters
System Q (Qtc) 1.095 (above Butterworth: Qtc cannot fall below Qts (0.77))
System Resonance (Fc) 56.6 Hz
F3 (-3 dB Cutoff) 47.1 Hz
F6 / F10 Extension 39.3 Hz / 31.7 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 40.0 Hz
Total Q (Qts) 0.774
Electrical Q (Qes) 0.891
Mechanical Q (Qms) 5.88
Equivalent Volume (Vas) 36.8 Liters
Diaphragm Area (Sd) 350.0 cm²
DC Resistance (Re) 3.6 Ω
Efficiency Bandwidth Product (EBP) 44.9
Linear Excursion (Xmax) 8.5 mm
Thermal Power (Pe) 220.0 W
Nominal Diameter 10.0"
Catalog Source Load Forge catalog (manufacturer datasheets and retailer listings)

Frequently Asked Questions

What is the recommended ported (bass reflex) box volume for DS18 294-8076?

Load Forge's calculated alignment puts DS18 294-8076 in a 29.4 liter vented enclosure tuned to 34.0 Hz, reaching an F3 cutoff of approximately 49.8 Hz.

Can DS18 294-8076 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 36.8 liters with a Qtc of 1.095 (above Butterworth: Qtc cannot fall below Qts (0.77)), the system exhibits an F3 of 47.1 Hz.

What port dimensions should be used for DS18 294-8076 to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 33.6 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.

DS18 294-8076 Enclosure Card
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