Bomber SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR
Best box: 18.3 L bass reflex tuned to 40.8 Hz · F3 57.6 Hz
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Comparable 6.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Bomber SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 18.3 Liters |
| Tuning Frequency (Fb) | 40.8 Hz |
| F3 (-3 dB Cutoff) | 57.6 Hz |
| F6 / F10 Extension | 47.3 Hz / 36.2 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 15.7 cm |
| First Pipe Resonance | 1092.0 Hz |
| Estimated MOL @ F3 | 108.0 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) | 22.9 Liters |
| System Q (Qtc) | 0.948 (above Butterworth) |
| System Resonance (Fc) | 67.9 Hz |
| F3 (-3 dB Cutoff) | 57.6 Hz |
| F6 / F10 Extension | 46.9 Hz / 37.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 48.0 Hz |
| Total Q (Qts) | 0.67 |
| Electrical Q (Qes) | 0.825 |
| Mechanical Q (Qms) | 3.57 |
| Equivalent Volume (Vas) | 22.9 Liters |
| Diaphragm Area (Sd) | 204.0 cm² |
| DC Resistance (Re) | 3.39 Ω |
| Efficiency Bandwidth Product (EBP) | 58.2 |
| Linear Excursion (Xmax) | 5.1 mm |
| Thermal Power (Pe) | 200.0 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 SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR?
Load Forge's calculated alignment puts Bomber SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR in a 18.3 liter vented enclosure tuned to 40.8 Hz, reaching an F3 cutoff of approximately 57.6 Hz.
Can Bomber SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 22.9 liters with a Qtc of 0.948 (above Butterworth), the system exhibits an F3 of 57.6 Hz.
What port dimensions should be used for Bomber SUBWOOFER QUADRIAXIAL 6X9″ TKL 400 WRMS PAR to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 15.7 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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