Beyma LOUDSPEAKER 8"BR40/N 8 OH
Best box: 89.6 L bass reflex tuned to 29.4 Hz · F3 28.4 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Beyma LOUDSPEAKER 8"BR40/N 8 OH 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) | 89.6 Liters |
| Tuning Frequency (Fb) | 29.4 Hz |
| F3 (-3 dB Cutoff) | 28.4 Hz |
| F6 / F10 Extension | 25.3 Hz / 22.3 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 4.0 cm |
| First Pipe Resonance | 4274.0 Hz |
| Estimated MOL @ F3 | 102.5 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 39.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 52.4 Hz |
| F3 (-3 dB Cutoff) | 54.5 Hz |
| F6 / F10 Extension | 40.9 Hz / 30.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 30.0 Hz |
| Total Q (Qts) | 0.39 |
| Electrical Q (Qes) | 0.479 |
| Mechanical Q (Qms) | 2.1 |
| Equivalent Volume (Vas) | 89.1 Liters |
| Diaphragm Area (Sd) | 220.0 cm² |
| DC Resistance (Re) | 5.5 Ω |
| Efficiency Bandwidth Product (EBP) | 62.6 |
| Linear Excursion (Xmax) | 6.7 mm |
| Thermal Power (Pe) | 50.0 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 Beyma LOUDSPEAKER 8"BR40/N 8 OH?
Load Forge's calculated alignment puts Beyma LOUDSPEAKER 8"BR40/N 8 OH in a 89.6 liter vented enclosure tuned to 29.4 Hz, reaching an F3 cutoff of approximately 28.4 Hz.
Can Beyma LOUDSPEAKER 8"BR40/N 8 OH be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 39.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 54.5 Hz.
What port dimensions should be used for Beyma LOUDSPEAKER 8"BR40/N 8 OH to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 4.0 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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