MTX Audio T8512-04
Best box: 54.7 L bass reflex tuned to 25.4 Hz · F3 32.5 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the MTX Audio T8512-04 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
- Port length (95.3 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) | 54.7 Liters |
| Tuning Frequency (Fb) | 25.4 Hz |
| F3 (-3 dB Cutoff) | 32.5 Hz |
| F6 / F10 Extension | 23.2 Hz / 19.5 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 95.3 cm |
| First Pipe Resonance | 180.0 Hz |
| Estimated MOL @ F3 | 121.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 75.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 43.7 Hz |
| F3 (-3 dB Cutoff) | 44.3 Hz |
| F6 / F10 Extension | 33.4 Hz / 25.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 36.4 Hz |
| Total Q (Qts) | 0.58 |
| Electrical Q (Qes) | 0.719 |
| Mechanical Q (Qms) | 3.0 |
| Equivalent Volume (Vas) | 36.4 Liters |
| Diaphragm Area (Sd) | 558.6 cm² |
| DC Resistance (Re) | 3.21 Ω |
| Efficiency Bandwidth Product (EBP) | 50.6 |
| Linear Excursion (Xmax) | 21.6 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 12.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for MTX Audio T8512-04?
Load Forge's calculated alignment puts MTX Audio T8512-04 in a 54.7 liter vented enclosure tuned to 25.4 Hz, reaching an F3 cutoff of approximately 32.5 Hz.
Can MTX Audio T8512-04 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 75.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 44.3 Hz.
What port dimensions should be used for MTX Audio T8512-04 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 95.3 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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