FaitalPRO 5PR120-8F
Best box: 1.9 L bass reflex tuned to 95.5 Hz · F3 169.0 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the FaitalPRO 5PR120-8F 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 (1.5 L at 136.5 Hz) would need a 17.5 cm port; the recommendation is retuned to 1.9 L at 95.5 Hz so the port can be built.
- Limited linear excursion (Xmax: 3.1 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) | 1.9 Liters |
| Tuning Frequency (Fb) | 95.5 Hz |
| F3 (-3 dB Cutoff) | 169.0 Hz |
| F6 / F10 Extension | 107.3 Hz / 85.0 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 30.4 cm |
| First Pipe Resonance | 566.0 Hz |
| Estimated MOL @ F3 | 109.1 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 0.72 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 254.1 Hz |
| F3 (-3 dB Cutoff) | 243.2 Hz |
| F6 / F10 Extension | 187.0 Hz / 141.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 100.0 Hz |
| Total Q (Qts) | 0.27 |
| Electrical Q (Qes) | 0.279 |
| Mechanical Q (Qms) | 8.0 |
| Equivalent Volume (Vas) | 4.2 Liters |
| Diaphragm Area (Sd) | 102.2 cm² |
| DC Resistance (Re) | 5.0 Ω |
| Efficiency Bandwidth Product (EBP) | 357.9 |
| Linear Excursion (Xmax) | 3.1 mm |
| Thermal Power (Pe) | 100.0 W |
| Nominal Diameter | 5.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for FaitalPRO 5PR120-8F?
Load Forge's calculated alignment puts FaitalPRO 5PR120-8F in a 1.9 liter vented enclosure tuned to 95.5 Hz, reaching an F3 cutoff of approximately 169.0 Hz.
Can FaitalPRO 5PR120-8F be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 0.72 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 243.2 Hz.
What port dimensions should be used for FaitalPRO 5PR120-8F to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 30.4 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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