HiVi L6-4R
Best box: 15.9 L bass reflex tuned to 47.9 Hz · F3 47.3 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the HiVi L6-4R does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 15.9 Liters |
| Tuning Frequency (Fb) | 47.9 Hz |
| F3 (-3 dB Cutoff) | 47.3 Hz |
| F6 / F10 Extension | 41.3 Hz / 36.1 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 12.6 cm |
| First Pipe Resonance | 1370.0 Hz |
| Estimated MOL @ F3 | 99.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 6.9 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 86.4 Hz |
| F3 (-3 dB Cutoff) | 78.4 Hz |
| F6 / F10 Extension | 62.2 Hz / 48.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 50.0 Hz |
| Total Q (Qts) | 0.4 |
| Electrical Q (Qes) | 0.446 |
| Mechanical Q (Qms) | 3.86 |
| Equivalent Volume (Vas) | 14.7 Liters |
| Diaphragm Area (Sd) | 133.0 cm² |
| DC Resistance (Re) | 3.6 Ω |
| Efficiency Bandwidth Product (EBP) | 112.0 |
| Linear Excursion (Xmax) | 4.3 mm |
| Thermal Power (Pe) | 30.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for HiVi L6-4R?
Load Forge's calculated alignment puts HiVi L6-4R in a 15.9 liter vented enclosure tuned to 47.9 Hz, reaching an F3 cutoff of approximately 47.3 Hz.
Can HiVi L6-4R be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 6.9 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 78.4 Hz.
What port dimensions should be used for HiVi L6-4R to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 12.6 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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