Pride M.45 12 Subwoofer RMS 4500W Size 12″
Best box: 3.6 L sealed · Fc 90.0 Hz · F3 120.7 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Pride M.45 12 Subwoofer RMS 4500W Size 12″ 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
- Straight vent would be 688.8 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 6.4 Liters |
| Tuning Frequency (Fb) | 46.2 Hz |
| F3 (-3 dB Cutoff) | 95.2 Hz |
| F6 / F10 Extension | 45.3 Hz / 39.4 Hz |
| Port Inner Diameter | Ø 20.2 cm |
| Port Physical Length | 688.8 cm |
| First Pipe Resonance | 25.0 Hz |
| Estimated MOL @ F3 | 120.4 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 3.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 90.0 Hz |
| F3 (-3 dB Cutoff) | 120.7 Hz |
| F6 / F10 Extension | 83.6 Hz / 56.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 27.1 Hz |
| Total Q (Qts) | 0.211 |
| Electrical Q (Qes) | 0.224 |
| Mechanical Q (Qms) | 3.77 |
| Equivalent Volume (Vas) | 37.2 Liters |
| Diaphragm Area (Sd) | 530.0 cm² |
| DC Resistance (Re) | 0.75 Ω |
| Efficiency Bandwidth Product (EBP) | 121.2 |
| Linear Excursion (Xmax) | 36.0 mm |
| Thermal Power (Pe) | 4500.0 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 Pride M.45 12 Subwoofer RMS 4500W Size 12″?
A simple ported box is not recommended for Pride M.45 12 Subwoofer RMS 4500W Size 12″: the textbook alignment (6.4 liters tuned to 46.2 Hz) needs a 688.8 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can Pride M.45 12 Subwoofer RMS 4500W Size 12″ be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 3.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 120.7 Hz.
What port dimensions should be used for Pride M.45 12 Subwoofer RMS 4500W Size 12″ to avoid port chuffing?
A straight 20.2 cm port would need 688.8 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
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