PRV Audio 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker
Best box: 13.8 L bass reflex tuned to 78.3 Hz · F3 117.2 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the PRV Audio 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker 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: 2.75 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) | 13.8 Liters |
| Tuning Frequency (Fb) | 78.3 Hz |
| F3 (-3 dB Cutoff) | 117.2 Hz |
| F6 / F10 Extension | 102.1 Hz / 83.0 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 3.4 cm |
| First Pipe Resonance | 5087.0 Hz |
| Estimated MOL @ F3 | 115.4 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 1.09 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.541; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 17.2 Liters |
| System Q (Qtc) | 1.541 (above Butterworth: Qtc cannot fall below Qts (1.09)) |
| System Resonance (Fc) | 130.2 Hz |
| F3 (-3 dB Cutoff) | 103.0 Hz |
| F6 / F10 Extension | 89.3 Hz / 74.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 92.1 Hz |
| Total Q (Qts) | 1.09 |
| Electrical Q (Qes) | 1.195 |
| Mechanical Q (Qms) | 12.43 |
| Equivalent Volume (Vas) | 17.2 Liters |
| Diaphragm Area (Sd) | 235.0 cm² |
| DC Resistance (Re) | 3.6 Ω |
| Efficiency Bandwidth Product (EBP) | 77.1 |
| Linear Excursion (Xmax) | 2.8 mm |
| Thermal Power (Pe) | 380.0 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 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker?
Load Forge's calculated alignment puts PRV Audio 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker in a 13.8 liter vented enclosure tuned to 78.3 Hz, reaching an F3 cutoff of approximately 117.2 Hz.
Can PRV Audio 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 17.2 liters with a Qtc of 1.541 (above Butterworth: Qtc cannot fall below Qts (1.09)), the system exhibits an F3 of 103.0 Hz.
What port dimensions should be used for PRV Audio 8CX380-4 SLIM 8" Full-Range Slim Coaxial Speaker to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 3.4 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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