Acr Speaker C-630 WH
Best box: 16.3 L bass reflex tuned to 44.1 Hz · F3 63.3 Hz
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Comparable 6.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Acr Speaker C-630 WH 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: 2.4 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) | 16.3 Liters |
| Tuning Frequency (Fb) | 44.1 Hz |
| F3 (-3 dB Cutoff) | 63.3 Hz |
| F6 / F10 Extension | 53.0 Hz / 41.1 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 15.0 cm |
| First Pipe Resonance | 1147.0 Hz |
| Estimated MOL @ F3 | 99.4 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.78 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.103; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 20.4 Liters |
| System Q (Qtc) | 1.103 (above Butterworth: Qtc cannot fall below Qts (0.78)) |
| System Resonance (Fc) | 73.4 Hz |
| F3 (-3 dB Cutoff) | 59.9 Hz |
| F6 / F10 Extension | 49.8 Hz / 40.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 51.9 Hz |
| Total Q (Qts) | 0.78 |
| Electrical Q (Qes) | 0.997 |
| Mechanical Q (Qms) | 3.59 |
| Equivalent Volume (Vas) | 20.4 Liters |
| Diaphragm Area (Sd) | 136.8 cm² |
| DC Resistance (Re) | 5.0 Ω |
| Efficiency Bandwidth Product (EBP) | 52.1 |
| Linear Excursion (Xmax) | 2.4 mm |
| Thermal Power (Pe) | N/A 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 Acr Speaker C-630 WH?
Load Forge's calculated alignment puts Acr Speaker C-630 WH in a 16.3 liter vented enclosure tuned to 44.1 Hz, reaching an F3 cutoff of approximately 63.3 Hz.
Can Acr Speaker C-630 WH be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 20.4 liters with a Qtc of 1.103 (above Butterworth: Qtc cannot fall below Qts (0.78)), the system exhibits an F3 of 59.9 Hz.
What port dimensions should be used for Acr Speaker C-630 WH to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 15.0 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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