Altec Lansing 414-8E
Best box: 28.6 L bass reflex tuned to 56.7 Hz · F3 71.4 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Altec Lansing 414-8E 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
- Limited linear excursion (Xmax: 3.81 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) | 28.6 Liters |
| Tuning Frequency (Fb) | 56.7 Hz |
| F3 (-3 dB Cutoff) | 71.4 Hz |
| F6 / F10 Extension | 59.7 Hz / 50.1 Hz |
| Port Inner Diameter | Ø 7.5 cm |
| Port Physical Length | 9.0 cm |
| First Pipe Resonance | 1903.0 Hz |
| Estimated MOL @ F3 | 119.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 17.4 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 106.0 Hz |
| F3 (-3 dB Cutoff) | 103.2 Hz |
| F6 / F10 Extension | 79.0 Hz / 60.0 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 30.3 Hz |
| Total Q (Qts) | 0.19 |
| Electrical Q (Qes) | 0.195 |
| Mechanical Q (Qms) | 7.31 |
| Equivalent Volume (Vas) | 224.0 Liters |
| Diaphragm Area (Sd) | 507.5 cm² |
| DC Resistance (Re) | 6.4 Ω |
| Efficiency Bandwidth Product (EBP) | 155.3 |
| Linear Excursion (Xmax) | 3.8 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 Altec Lansing 414-8E?
Load Forge's calculated alignment puts Altec Lansing 414-8E in a 28.6 liter vented enclosure tuned to 56.7 Hz, reaching an F3 cutoff of approximately 71.4 Hz.
Can Altec Lansing 414-8E be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 17.4 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 103.2 Hz.
What port dimensions should be used for Altec Lansing 414-8E to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 9.0 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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