Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR
Best box: 15.9 L sealed · Fc 104.7 Hz · F3 90.1 Hz
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Comparable 6.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR 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: 1.55 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (4.0 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 12.7 Liters |
| Tuning Frequency (Fb) | 62.9 Hz |
| F3 (-3 dB Cutoff) | 105.4 Hz |
| F6 / F10 Extension | 97.5 Hz / 86.3 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 8.1 cm |
| First Pipe Resonance | 2113.0 Hz |
| Estimated MOL @ F3 | 106.0 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 2.8 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 3.96; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 15.9 Liters |
| System Q (Qtc) | 3.96 (above Butterworth: Qtc cannot fall below Qts (2.80)) |
| System Resonance (Fc) | 104.7 Hz |
| F3 (-3 dB Cutoff) | 90.1 Hz |
| F6 / F10 Extension | 83.5 Hz / 74.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 74.0 Hz |
| Total Q (Qts) | 2.8 |
| Electrical Q (Qes) | 6.905 |
| Mechanical Q (Qms) | 4.71 |
| Equivalent Volume (Vas) | 15.9 Liters |
| Diaphragm Area (Sd) | 204.2 cm² |
| DC Resistance (Re) | 3.88 Ω |
| Efficiency Bandwidth Product (EBP) | 10.7 |
| Linear Excursion (Xmax) | 1.6 mm |
| Thermal Power (Pe) | 60.0 W |
| Nominal Diameter | 6.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR?
A simple ported box is not recommended for Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR: the textbook alignment (12.7 liters tuned to 62.9 Hz) needs a 8.1 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 15.9 liters with a Qtc of 3.96 (above Butterworth: Qtc cannot fall below Qts (2.80)), the system exhibits an F3 of 90.1 Hz.
What port dimensions should be used for Bomber QUADRIAXIAL 6X9″ BBMAX 120 WRMS 4 OHMS PAR to avoid port chuffing?
A straight 5.0 cm port would need 8.1 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
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