MATCH UP W8MB-S4 LHD
Best box: 14.4 L bass reflex tuned to 43.4 Hz · F3 61.1 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the MATCH UP W8MB-S4 LHD does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 14.4 Liters |
| Tuning Frequency (Fb) | 43.4 Hz |
| F3 (-3 dB Cutoff) | 61.1 Hz |
| F6 / F10 Extension | 49.8 Hz / 38.0 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 18.1 cm |
| First Pipe Resonance | 949.0 Hz |
| Estimated MOL @ F3 | 106.5 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.64 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.905; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 18.0 Liters |
| System Q (Qtc) | 0.905 (above Butterworth) |
| System Resonance (Fc) | 72.1 Hz |
| F3 (-3 dB Cutoff) | 62.4 Hz |
| F6 / F10 Extension | 50.5 Hz / 39.8 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 51.0 Hz |
| Total Q (Qts) | 0.64 |
| Electrical Q (Qes) | 0.702 |
| Mechanical Q (Qms) | 7.24 |
| Equivalent Volume (Vas) | 18.0 Liters |
| Diaphragm Area (Sd) | 216.0 cm² |
| DC Resistance (Re) | 3.6 Ω |
| Efficiency Bandwidth Product (EBP) | 72.6 |
| Linear Excursion (Xmax) | 5.0 mm |
| Thermal Power (Pe) | 100.0 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 MATCH UP W8MB-S4 LHD?
Load Forge's calculated alignment puts MATCH UP W8MB-S4 LHD in a 14.4 liter vented enclosure tuned to 43.4 Hz, reaching an F3 cutoff of approximately 61.1 Hz.
Can MATCH UP W8MB-S4 LHD be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 18.0 liters with a Qtc of 0.905 (above Butterworth), the system exhibits an F3 of 62.4 Hz.
What port dimensions should be used for MATCH UP W8MB-S4 LHD to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 18.1 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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