Versatile Load

AudioTechnology Flexunits 10H77

Best box: 56.3 L bass reflex tuned to 30.4 Hz · F3 33.5 Hz

Predicted SPL response of the AudioTechnology Flexunits 10H77 in the recommended 56.3 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) 56.3 Liters
Tuning Frequency (Fb) 30.4 Hz
F3 (-3 dB Cutoff) 33.5 Hz
F6 / F10 Extension 28.7 Hz / 24.7 Hz
Port Inner Diameter Ø 7.5 cm
Port Physical Length 20.1 cm
First Pipe Resonance 856.0 Hz
Estimated MOL @ F3 112.2 dB SPL
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Recommended Sealed (Acoustic Suspension)

MAX TRANSIENT DAMPING
Net Box Volume (Vb) 27.0 Liters
System Q (Qtc) 0.707 (Butterworth)
System Resonance (Fc) 56.4 Hz
F3 (-3 dB Cutoff) 58.3 Hz
F6 / F10 Extension 43.8 Hz / 32.9 Hz
Air Spring Linearity High (Zero port compression)
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Thiele/Small Parameters

Resonance (Fs) 23.0 Hz
Total Q (Qts) 0.28
Electrical Q (Qes) 0.297
Mechanical Q (Qms) 4.8
Equivalent Volume (Vas) 145.0 Liters
Diaphragm Area (Sd) 350.0 cm²
DC Resistance (Re) 5.8 Ω
Efficiency Bandwidth Product (EBP) 77.4
Linear Excursion (Xmax) 10.0 mm
Thermal Power (Pe) 400.0 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 AudioTechnology Flexunits 10H77?

Load Forge's calculated alignment puts AudioTechnology Flexunits 10H77 in a 56.3 liter vented enclosure tuned to 30.4 Hz, reaching an F3 cutoff of approximately 33.5 Hz.

Can AudioTechnology Flexunits 10H77 be used in a sealed box?

Yes. In a sealed (acoustic suspension) enclosure of 27.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 58.3 Hz.

What port dimensions should be used for AudioTechnology Flexunits 10H77 to avoid port chuffing?

Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 20.1 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.

AudioTechnology Flexunits 10H77 Enclosure Card
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