SEAS H1262-08 MCA15RCY
Best box: 3.4 L bass reflex tuned to 74.6 Hz · F3 85.9 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SEAS H1262-08 MCA15RCY 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: 1.7 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) | 3.4 Liters |
| Tuning Frequency (Fb) | 74.6 Hz |
| F3 (-3 dB Cutoff) | 85.9 Hz |
| F6 / F10 Extension | 72.3 Hz / 61.7 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 27.5 cm |
| First Pipe Resonance | 625.0 Hz |
| Estimated MOL @ F3 | 102.8 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 1.7 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 140.4 Hz |
| F3 (-3 dB Cutoff) | 134.5 Hz |
| F6 / F10 Extension | 103.9 Hz / 78.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 51.0 Hz |
| Total Q (Qts) | 0.25 |
| Electrical Q (Qes) | 0.306 |
| Mechanical Q (Qms) | 1.36 |
| Equivalent Volume (Vas) | 12.0 Liters |
| Diaphragm Area (Sd) | 80.0 cm² |
| DC Resistance (Re) | 5.8 Ω |
| Efficiency Bandwidth Product (EBP) | 166.5 |
| Linear Excursion (Xmax) | 1.7 mm |
| Thermal Power (Pe) | 300.0 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 SEAS H1262-08 MCA15RCY?
Load Forge's calculated alignment puts SEAS H1262-08 MCA15RCY in a 3.4 liter vented enclosure tuned to 74.6 Hz, reaching an F3 cutoff of approximately 85.9 Hz.
Can SEAS H1262-08 MCA15RCY be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 1.7 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 134.5 Hz.
What port dimensions should be used for SEAS H1262-08 MCA15RCY to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 27.5 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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