American Bass VFL-822
Best box: 6.5 L bass reflex tuned to 40.2 Hz · F3 37.2 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the American Bass VFL-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 (3.7 L at 40.2 Hz) would need a 177.2 cm port; the recommendation is retuned to 6.5 L at 40.2 Hz so the port can be built.
- Port length (98.8 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 6.5 Liters |
| Tuning Frequency (Fb) | 40.2 Hz |
| F3 (-3 dB Cutoff) | 37.2 Hz |
| F6 / F10 Extension | 34.2 Hz / 30.9 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 98.8 cm |
| First Pipe Resonance | 174.0 Hz |
| Estimated MOL @ F3 | 105.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 1.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 74.9 Hz |
| F3 (-3 dB Cutoff) | 76.9 Hz |
| F6 / F10 Extension | 57.7 Hz / 43.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 37.2 Hz |
| Total Q (Qts) | 0.35 |
| Electrical Q (Qes) | 0.382 |
| Mechanical Q (Qms) | 4.14 |
| Equivalent Volume (Vas) | 5.0 Liters |
| Diaphragm Area (Sd) | 180.5 cm² |
| DC Resistance (Re) | 0.95 Ω |
| Efficiency Bandwidth Product (EBP) | 97.3 |
| Linear Excursion (Xmax) | 13.0 mm |
| Thermal Power (Pe) | 600.0 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 VFL-822?
Load Forge's calculated alignment puts American Bass VFL-822 in a 6.5 liter vented enclosure tuned to 40.2 Hz, reaching an F3 cutoff of approximately 37.2 Hz.
Can American Bass VFL-822 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 1.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 76.9 Hz.
What port dimensions should be used for American Bass VFL-822 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 98.8 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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