American Bass HD-822
Best box: 3.4 L bass reflex tuned to 60.5 Hz · F3 57.6 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the American Bass HD-822 does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
⚠️ Engineering Notice for Builders
- The textbook alignment (3.4 L at 50.4 Hz) would need a 64.6 cm port; the recommendation is retuned to 3.4 L at 60.5 Hz so the port can be built.
- Limited linear excursion (Xmax: 0.6 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) | 3.4 Liters |
| Tuning Frequency (Fb) | 60.5 Hz |
| F3 (-3 dB Cutoff) | 57.6 Hz |
| F6 / F10 Extension | 52.1 Hz / 46.4 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 43.7 cm |
| First Pipe Resonance | 393.0 Hz |
| Estimated MOL @ F3 | 96.8 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 1.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 93.0 Hz |
| F3 (-3 dB Cutoff) | 92.9 Hz |
| F6 / F10 Extension | 70.5 Hz / 53.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 49.8 Hz |
| Total Q (Qts) | 0.377 |
| Electrical Q (Qes) | 0.42 |
| Mechanical Q (Qms) | 3.68 |
| Equivalent Volume (Vas) | 3.7 Liters |
| Diaphragm Area (Sd) | 168.8 cm² |
| DC Resistance (Re) | 1.01 Ω |
| Efficiency Bandwidth Product (EBP) | 118.7 |
| Linear Excursion (Xmax) | 0.6 mm |
| Thermal Power (Pe) | 400.0 W |
| Nominal Diameter | 8.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for American Bass HD-822?
Load Forge's calculated alignment puts American Bass HD-822 in a 3.4 liter vented enclosure tuned to 60.5 Hz, reaching an F3 cutoff of approximately 57.6 Hz.
Can American Bass HD-822 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 1.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 92.9 Hz.
What port dimensions should be used for American Bass HD-822 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 43.7 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.
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