LaVoce LAVSAN18450iPAF
Best box: 16.4 L bass reflex tuned to 125.9 Hz · F3 123.8 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the LaVoce LAVSAN18450iPAF 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 (9.4 L at 78.7 Hz) would need a 326.2 cm port; the recommendation is retuned to 16.4 L at 125.9 Hz so the port can be built.
- Port length (98.1 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) | 16.4 Liters |
| Tuning Frequency (Fb) | 125.9 Hz |
| F3 (-3 dB Cutoff) | 123.8 Hz |
| F6 / F10 Extension | 113.7 Hz / 102.0 Hz |
| Port Inner Diameter | Ø 37.1 cm |
| Port Physical Length | 98.1 cm |
| First Pipe Resonance | 175.0 Hz |
| Estimated MOL @ F3 | 159.6 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) | 154.9 Hz |
| F3 (-3 dB Cutoff) | 136.4 Hz |
| F6 / F10 Extension | 106.7 Hz / 81.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 34.0 Hz |
| Total Q (Qts) | 0.15 |
| Electrical Q (Qes) | 0.154 |
| Mechanical Q (Qms) | 6.06 |
| Equivalent Volume (Vas) | 145.4 Liters |
| Diaphragm Area (Sd) | 1225.0 cm² |
| DC Resistance (Re) | 1.37 Ω |
| Efficiency Bandwidth Product (EBP) | 221.1 |
| Linear Excursion (Xmax) | 19.2 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 18.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for LaVoce LAVSAN18450iPAF?
Load Forge's calculated alignment puts LaVoce LAVSAN18450iPAF in a 16.4 liter vented enclosure tuned to 125.9 Hz, reaching an F3 cutoff of approximately 123.8 Hz.
Can LaVoce LAVSAN18450iPAF 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 136.4 Hz.
What port dimensions should be used for LaVoce LAVSAN18450iPAF to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 37.1 cm with a length of 98.1 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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