FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω)
Best box: 106.7 L bass reflex tuned to 39.3 Hz · F3 39.9 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω) 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 (106.7 L at 37.4 Hz) would need a 48.8 cm port; the recommendation is retuned to 106.7 L at 39.3 Hz so the port can be built.
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 106.7 Liters |
| Tuning Frequency (Fb) | 39.3 Hz |
| F3 (-3 dB Cutoff) | 39.9 Hz |
| F6 / F10 Extension | 35.2 Hz / 30.7 Hz |
| Port Inner Diameter ESTIMATED | Ø 20.0 cm |
| Port Physical Length | 42.8 cm |
| First Pipe Resonance | 401.0 Hz |
| Estimated MOL @ F3 | 123.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 48.8 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 67.8 Hz |
| F3 (-3 dB Cutoff) | 71.3 Hz |
| F6 / F10 Extension | 53.6 Hz / 40.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 31.0 Hz |
| Total Q (Qts) | 0.31 |
| Electrical Q (Qes) | 0.324 |
| Mechanical Q (Qms) | 7.4 |
| Equivalent Volume (Vas) | 205.0 Liters |
| Diaphragm Area (Sd) | 1174.0 cm² |
| DC Resistance (Re) | 5.4 Ω |
| Efficiency Bandwidth Product (EBP) | 95.8 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 1500.0 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 FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω)?
Load Forge's calculated alignment puts FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω) in a 106.7 liter vented enclosure tuned to 39.3 Hz, reaching an F3 cutoff of approximately 39.9 Hz.
Can FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω) be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 48.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 71.3 Hz.
What port dimensions should be used for FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω) to avoid port chuffing?
Xmax is not published for FaitalPRO 18XL150018" - 1500 W - 98 dB - 8 Ohm (8Ω), so the port is an empirical estimate: a 20.0 cm diameter with a length of 42.8 cm (area at least 12 in² per ft³ of net volume). Check the air velocity at your power level in Load Forge Studio.
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