Soundking FA0638GCX34
Best box: 9.6 L bass reflex tuned to 58.9 Hz · F3 73.3 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Soundking FA0638GCX34 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: 2.5 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) | 9.6 Liters |
| Tuning Frequency (Fb) | 58.9 Hz |
| F3 (-3 dB Cutoff) | 73.3 Hz |
| F6 / F10 Extension | 53.0 Hz / 45.0 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 14.1 cm |
| First Pipe Resonance | 1220.0 Hz |
| Estimated MOL @ F3 | 100.1 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 13.2 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 99.9 Hz |
| F3 (-3 dB Cutoff) | 101.4 Hz |
| F6 / F10 Extension | 76.6 Hz / 57.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 84.2 Hz |
| Total Q (Qts) | 0.58 |
| Electrical Q (Qes) | 0.626 |
| Mechanical Q (Qms) | 7.92 |
| Equivalent Volume (Vas) | 6.4 Liters |
| Diaphragm Area (Sd) | 133.7 cm² |
| DC Resistance (Re) | 3.1 Ω |
| Efficiency Bandwidth Product (EBP) | 134.5 |
| Linear Excursion (Xmax) | 2.5 mm |
| Thermal Power (Pe) | 20.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Soundking FA0638GCX34?
Load Forge's calculated alignment puts Soundking FA0638GCX34 in a 9.6 liter vented enclosure tuned to 58.9 Hz, reaching an F3 cutoff of approximately 73.3 Hz.
Can Soundking FA0638GCX34 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 13.2 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 101.4 Hz.
What port dimensions should be used for Soundking FA0638GCX34 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 14.1 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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