Acoustic Elegance TD18H+4
Best box: 75.8 L bass reflex tuned to 47.6 Hz · F3 55.1 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Acoustic Elegance TD18H+4 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) | 75.8 Liters |
| Tuning Frequency (Fb) | 47.6 Hz |
| F3 (-3 dB Cutoff) | 55.1 Hz |
| F6 / F10 Extension | 47.0 Hz / 40.1 Hz |
| Port Inner Diameter | Ø 20.0 cm |
| Port Physical Length | 40.5 cm |
| First Pipe Resonance | 424.0 Hz |
| Estimated MOL @ F3 | 123.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 41.8 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 87.6 Hz |
| F3 (-3 dB Cutoff) | 87.7 Hz |
| F6 / F10 Extension | 66.1 Hz / 49.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 29.0 Hz |
| Total Q (Qts) | 0.22 |
| Electrical Q (Qes) | 0.229 |
| Mechanical Q (Qms) | 5.9 |
| Equivalent Volume (Vas) | 390.0 Liters |
| Diaphragm Area (Sd) | 1218.0 cm² |
| DC Resistance (Re) | 2.8 Ω |
| Efficiency Bandwidth Product (EBP) | 126.9 |
| Linear Excursion (Xmax) | 14.0 mm |
| Thermal Power (Pe) | 1000.0 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 Acoustic Elegance TD18H+4?
Load Forge's calculated alignment puts Acoustic Elegance TD18H+4 in a 75.8 liter vented enclosure tuned to 47.6 Hz, reaching an F3 cutoff of approximately 55.1 Hz.
Can Acoustic Elegance TD18H+4 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 41.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 87.7 Hz.
What port dimensions should be used for Acoustic Elegance TD18H+4 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 20.0 cm with a length of 40.5 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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