PRV Audio MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker
Best box: 2.9 L sealed · Fc 175.9 Hz · F3 176.3 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the PRV Audio MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker 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 804.2 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) | 6.6 Liters |
| Tuning Frequency (Fb) | 99.2 Hz |
| F3 (-3 dB Cutoff) | 93.7 Hz |
| F6 / F10 Extension | 83.9 Hz / 74.3 Hz |
| Port Inner Diameter | Ø 48.1 cm |
| Port Physical Length | 804.2 cm |
| First Pipe Resonance | 21.0 Hz |
| Estimated MOL @ F3 | 117.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 2.9 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 175.9 Hz |
| F3 (-3 dB Cutoff) | 176.3 Hz |
| F6 / F10 Extension | 134.0 Hz / 101.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 105.9 Hz |
| Total Q (Qts) | 0.41 |
| Electrical Q (Qes) | 0.431 |
| Mechanical Q (Qms) | 8.54 |
| Equivalent Volume (Vas) | 5.7 Liters |
| Diaphragm Area (Sd) | 143.0 cm² |
| DC Resistance (Re) | 3.0 Ω |
| Efficiency Bandwidth Product (EBP) | 245.9 |
| Linear Excursion (Xmax) | 350.0 mm |
| Thermal Power (Pe) | 500.0 W |
| Nominal Diameter | 6.5" |
| 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 MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker?
A simple ported box is not recommended for PRV Audio MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker: the textbook alignment (6.6 liters tuned to 99.2 Hz) needs a 804.2 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 PRV Audio MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 2.9 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 176.3 Hz.
What port dimensions should be used for PRV Audio MT6CX580-NDY-4 Moto Series 6.5" Coaxial Loudspeaker to avoid port chuffing?
A straight 48.1 cm port would need 804.2 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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