P.Audio BT15-800A
Best box: 192.3 L bass reflex tuned to 39.0 Hz · F3 36.0 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the P.Audio BT15-800A 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
- Large enclosure volume (192.3 L) requires extensive internal matrix bracing to prevent panel resonance.
- Limited linear excursion (Xmax: 3.9 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) | 192.3 Liters |
| Tuning Frequency (Fb) | 39.0 Hz |
| F3 (-3 dB Cutoff) | 36.0 Hz |
| F6 / F10 Extension | 32.4 Hz / 28.9 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 3.6 cm |
| First Pipe Resonance | 4727.0 Hz |
| Estimated MOL @ F3 | 116.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 109.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 66.4 Hz |
| F3 (-3 dB Cutoff) | 66.0 Hz |
| F6 / F10 Extension | 49.4 Hz / 37.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 48.0 Hz |
| Total Q (Qts) | 0.48 |
| Electrical Q (Qes) | 0.506 |
| Mechanical Q (Qms) | 9.41 |
| Equivalent Volume (Vas) | 128.2 Liters |
| Diaphragm Area (Sd) | 855.0 cm² |
| DC Resistance (Re) | 5.4 Ω |
| Efficiency Bandwidth Product (EBP) | 94.9 |
| Linear Excursion (Xmax) | 3.9 mm |
| Thermal Power (Pe) | 300.0 W |
| Nominal Diameter | 15.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for P.Audio BT15-800A?
Load Forge's calculated alignment puts P.Audio BT15-800A in a 192.3 liter vented enclosure tuned to 39.0 Hz, reaching an F3 cutoff of approximately 36.0 Hz.
Can P.Audio BT15-800A be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 109.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 66.0 Hz.
What port dimensions should be used for P.Audio BT15-800A to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 3.6 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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