GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm
Best box: 39.6 L bass reflex tuned to 21.9 Hz · F3 49.2 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm 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
- The textbook alignment (31.7 L at 36.5 Hz) would need a 26.0 cm port; the recommendation is retuned to 39.6 L at 21.9 Hz so the port can be built.
- Port length (52.5 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) | 39.6 Liters |
| Tuning Frequency (Fb) | 21.9 Hz |
| F3 (-3 dB Cutoff) | 49.2 Hz |
| F6 / F10 Extension | 41.3 Hz / 32.7 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 52.5 cm |
| First Pipe Resonance | 328.0 Hz |
| Estimated MOL @ F3 | 106.7 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.93 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.315; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 39.6 Liters |
| System Q (Qtc) | 1.315 (above Butterworth: Qtc cannot fall below Qts (0.93)) |
| System Resonance (Fc) | 60.8 Hz |
| F3 (-3 dB Cutoff) | 49.4 Hz |
| F6 / F10 Extension | 42.1 Hz / 34.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 43.0 Hz |
| Total Q (Qts) | 0.93 |
| Electrical Q (Qes) | 1.153 |
| Mechanical Q (Qms) | 4.8 |
| Equivalent Volume (Vas) | 39.6 Liters |
| Diaphragm Area (Sd) | 344.4 cm² |
| DC Resistance (Re) | 3.7 Ω |
| Efficiency Bandwidth Product (EBP) | 37.3 |
| Linear Excursion (Xmax) | 8.5 mm |
| Thermal Power (Pe) | 120.0 W |
| Nominal Diameter | 10.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm?
Load Forge's calculated alignment puts GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm in a 39.6 liter vented enclosure tuned to 21.9 Hz, reaching an F3 cutoff of approximately 49.2 Hz.
Can GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 39.6 liters with a Qtc of 1.315 (above Butterworth: Qtc cannot fall below Qts (0.93)), the system exhibits an F3 of 49.4 Hz.
What port dimensions should be used for GRS 10SW-4 10" Poly Cone Subwoofer 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 52.5 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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