Pride Onyx 5 ver.2
Best box: 4.4 L bass reflex tuned to 115.5 Hz · F3 126.5 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Pride Onyx 5 ver.2 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
- The textbook alignment (2.2 L at 128.3 Hz) would need a 12.7 cm port; the recommendation is retuned to 4.4 L at 115.5 Hz so the port can be built.
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 4.4 Liters |
| Tuning Frequency (Fb) | 115.5 Hz |
| F3 (-3 dB Cutoff) | 126.5 Hz |
| F6 / F10 Extension | 97.6 Hz / 86.3 Hz |
| Port Inner Diameter ESTIMATED | Ø 5.0 cm |
| Port Physical Length | 6.5 cm |
| First Pipe Resonance | 2666.0 Hz |
| Estimated MOL @ F3 | 109.8 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.85 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.202; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 2.8 Liters |
| System Q (Qtc) | 1.202 (above Butterworth: Qtc cannot fall below Qts (0.85)) |
| System Resonance (Fc) | 213.5 Hz |
| F3 (-3 dB Cutoff) | 165.7 Hz |
| F6 / F10 Extension | 138.7 Hz / 112.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 151.0 Hz |
| Total Q (Qts) | 0.85 |
| Electrical Q (Qes) | 1.104 |
| Mechanical Q (Qms) | 3.7 |
| Equivalent Volume (Vas) | 2.8 Liters |
| Diaphragm Area (Sd) | 84.0 cm² |
| DC Resistance (Re) | 3.1 Ω |
| Efficiency Bandwidth Product (EBP) | 136.8 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 80.0 W |
| Nominal Diameter | 5.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Pride Onyx 5 ver.2?
Load Forge's calculated alignment puts Pride Onyx 5 ver.2 in a 4.4 liter vented enclosure tuned to 115.5 Hz, reaching an F3 cutoff of approximately 126.5 Hz.
Can Pride Onyx 5 ver.2 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 2.8 liters with a Qtc of 1.202 (above Butterworth: Qtc cannot fall below Qts (0.85)), the system exhibits an F3 of 165.7 Hz.
What port dimensions should be used for Pride Onyx 5 ver.2 to avoid port chuffing?
Xmax is not published for Pride Onyx 5 ver.2, so the port is an empirical estimate: a 5.0 cm diameter with a length of 6.5 cm (area at least 12 in² per ft³ of net volume). Check the air velocity at your power level in 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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