JL Audio 13TW5-3
Best box: 89.2 L bass reflex tuned to 23.1 Hz · F3 21.9 Hz
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Comparable 13.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the JL Audio 13TW5-3 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 (89.2 L at 22.0 Hz) would need a 47.4 cm port; the recommendation is retuned to 89.2 L at 23.1 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 89.2 Liters |
| Tuning Frequency (Fb) | 23.1 Hz |
| F3 (-3 dB Cutoff) | 21.9 Hz |
| F6 / F10 Extension | 19.4 Hz / 17.2 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 42.3 cm |
| First Pipe Resonance | 407.0 Hz |
| Estimated MOL @ F3 | 115.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 54.5 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 39.3 Hz |
| F3 (-3 dB Cutoff) | 40.2 Hz |
| F6 / F10 Extension | 30.3 Hz / 22.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 27.5 Hz |
| Total Q (Qts) | 0.489 |
| Electrical Q (Qes) | 0.511 |
| Mechanical Q (Qms) | 11.23 |
| Equivalent Volume (Vas) | 59.5 Liters |
| Diaphragm Area (Sd) | 633.9 cm² |
| DC Resistance (Re) | 2.79 Ω |
| Efficiency Bandwidth Product (EBP) | 53.8 |
| Linear Excursion (Xmax) | 9.7 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 13.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for JL Audio 13TW5-3?
Load Forge's calculated alignment puts JL Audio 13TW5-3 in a 89.2 liter vented enclosure tuned to 23.1 Hz, reaching an F3 cutoff of approximately 21.9 Hz.
Can JL Audio 13TW5-3 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 54.5 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 40.2 Hz.
What port dimensions should be used for JL Audio 13TW5-3 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 42.3 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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