Beyma LOUDSPEAKER 12"GA50 8 OH
Best box: 27.2 L bass reflex tuned to 76.5 Hz · F3 116.2 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Beyma LOUDSPEAKER 12"GA50 8 OH 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: 3.0 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) | 27.2 Liters |
| Tuning Frequency (Fb) | 76.5 Hz |
| F3 (-3 dB Cutoff) | 116.2 Hz |
| F6 / F10 Extension | 101.5 Hz / 83.0 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 7.6 cm |
| First Pipe Resonance | 2251.0 Hz |
| Estimated MOL @ F3 | 122.1 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 1.16 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 1.64; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 34.0 Liters |
| System Q (Qtc) | 1.64 (above Butterworth: Qtc cannot fall below Qts (1.16)) |
| System Resonance (Fc) | 127.3 Hz |
| F3 (-3 dB Cutoff) | 101.7 Hz |
| F6 / F10 Extension | 88.4 Hz / 74.0 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 90.0 Hz |
| Total Q (Qts) | 1.16 |
| Electrical Q (Qes) | 1.259 |
| Mechanical Q (Qms) | 14.8 |
| Equivalent Volume (Vas) | 34.0 Liters |
| Diaphragm Area (Sd) | 530.0 cm² |
| DC Resistance (Re) | 6.2 Ω |
| Efficiency Bandwidth Product (EBP) | 71.5 |
| Linear Excursion (Xmax) | 3.0 mm |
| Thermal Power (Pe) | 250.0 W |
| Nominal Diameter | 12.0" |
| 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 12"GA50 8 OH?
Load Forge's calculated alignment puts Beyma LOUDSPEAKER 12"GA50 8 OH in a 27.2 liter vented enclosure tuned to 76.5 Hz, reaching an F3 cutoff of approximately 116.2 Hz.
Can Beyma LOUDSPEAKER 12"GA50 8 OH be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 34.0 liters with a Qtc of 1.64 (above Butterworth: Qtc cannot fall below Qts (1.16)), the system exhibits an F3 of 101.7 Hz.
What port dimensions should be used for Beyma LOUDSPEAKER 12"GA50 8 OH to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 10.0 cm with a length of 7.6 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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