PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm
Best box: 4.8 L bass reflex tuned to 92.5 Hz · F3 107.2 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 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
- Limited linear excursion (Xmax: 3.25 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) | 4.8 Liters |
| Tuning Frequency (Fb) | 92.5 Hz |
| F3 (-3 dB Cutoff) | 107.2 Hz |
| F6 / F10 Extension | 91.1 Hz / 77.5 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 21.6 cm |
| First Pipe Resonance | 795.0 Hz |
| Estimated MOL @ F3 | 114.6 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 2.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 174.3 Hz |
| F3 (-3 dB Cutoff) | 155.4 Hz |
| F6 / F10 Extension | 121.7 Hz / 93.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 58.7 Hz |
| Total Q (Qts) | 0.23 |
| Electrical Q (Qes) | 0.235 |
| Mechanical Q (Qms) | 11.0 |
| Equivalent Volume (Vas) | 21.8 Liters |
| Diaphragm Area (Sd) | 227.0 cm² |
| DC Resistance (Re) | 3.5 Ω |
| Efficiency Bandwidth Product (EBP) | 249.9 |
| Linear Excursion (Xmax) | 3.2 mm |
| Thermal Power (Pe) | 250.0 W |
| Nominal Diameter | 8.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm?
Load Forge's calculated alignment puts PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm in a 4.8 liter vented enclosure tuned to 92.5 Hz, reaching an F3 cutoff of approximately 107.2 Hz.
Can PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 2.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 155.4 Hz.
What port dimensions should be used for PRV Audio 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 21.6 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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Not sure if 8MR500CF-NDY-4 8" Midrange Neodymium Speaker Pair 4 Ohm fits your physical space?
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