Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS
Best box: 83.1 L bass reflex tuned to 23.8 Hz · F3 33.6 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS 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 (69.2 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) | 83.1 Liters |
| Tuning Frequency (Fb) | 23.8 Hz |
| F3 (-3 dB Cutoff) | 33.6 Hz |
| F6 / F10 Extension | 27.5 Hz / 21.0 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 69.2 cm |
| First Pipe Resonance | 249.0 Hz |
| Estimated MOL @ F3 | 117.0 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.67 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.948; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 103.8 Liters |
| System Q (Qtc) | 0.948 (above Butterworth) |
| System Resonance (Fc) | 39.6 Hz |
| F3 (-3 dB Cutoff) | 33.7 Hz |
| F6 / F10 Extension | 27.4 Hz / 21.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 28.0 Hz |
| Total Q (Qts) | 0.67 |
| Electrical Q (Qes) | 0.734 |
| Mechanical Q (Qms) | 7.65 |
| Equivalent Volume (Vas) | 103.8 Liters |
| Diaphragm Area (Sd) | 779.0 cm² |
| DC Resistance (Re) | 3.59 Ω |
| Efficiency Bandwidth Product (EBP) | 38.1 |
| Linear Excursion (Xmax) | 18.0 mm |
| Thermal Power (Pe) | 1200.0 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 Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS?
Load Forge's calculated alignment puts Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS in a 83.1 liter vented enclosure tuned to 23.8 Hz, reaching an F3 cutoff of approximately 33.6 Hz.
Can Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 103.8 liters with a Qtc of 0.948 (above Butterworth), the system exhibits an F3 of 33.7 Hz.
What port dimensions should be used for Bomber SUBWOOFER 15″ BICHO PAPÃO 1200 WRMS 4+4 OHMS to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 69.2 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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