GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm
Best box: 112.8 L bass reflex tuned to 34.3 Hz · F3 32.8 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm 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) | 112.8 Liters |
| Tuning Frequency (Fb) | 34.3 Hz |
| F3 (-3 dB Cutoff) | 32.8 Hz |
| F6 / F10 Extension | 29.3 Hz / 25.9 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 10.6 cm |
| First Pipe Resonance | 1624.0 Hz |
| Estimated MOL @ F3 | 114.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 49.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 60.9 Hz |
| F3 (-3 dB Cutoff) | 62.4 Hz |
| F6 / F10 Extension | 46.9 Hz / 35.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 35.0 Hz |
| Total Q (Qts) | 0.39 |
| Electrical Q (Qes) | 0.403 |
| Mechanical Q (Qms) | 12.1 |
| Equivalent Volume (Vas) | 112.1 Liters |
| Diaphragm Area (Sd) | 530.9 cm² |
| DC Resistance (Re) | 7.6 Ω |
| Efficiency Bandwidth Product (EBP) | 86.9 |
| Linear Excursion (Xmax) | 6.8 mm |
| Thermal Power (Pe) | 350.0 W |
| Nominal Diameter | 12.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm?
Load Forge's calculated alignment puts GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm in a 112.8 liter vented enclosure tuned to 34.3 Hz, reaching an F3 cutoff of approximately 32.8 Hz.
Can GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 49.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 62.4 Hz.
What port dimensions should be used for GRS 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 10.6 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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Not sure if 12PT-8 12" Paper Cone Pro Sound Woofer with 3" Voice Coil 8 Ohm fits your physical space?
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