SB Acoustics SB15BAC30-8-COAX-R1
Preliminary data: check the manufacturer's latest datasheet before building.
Best box: 14.0 L bass reflex tuned to 45.3 Hz · F3 44.6 Hz
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Comparable 5.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SB Acoustics SB15BAC30-8-COAX-R1 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) | 14.0 Liters |
| Tuning Frequency (Fb) | 45.3 Hz |
| F3 (-3 dB Cutoff) | 44.6 Hz |
| F6 / F10 Extension | 39.5 Hz / 34.7 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 16.9 cm |
| First Pipe Resonance | 1017.0 Hz |
| Estimated MOL @ F3 | 99.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 6.1 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 82.4 Hz |
| F3 (-3 dB Cutoff) | 83.1 Hz |
| F6 / F10 Extension | 62.7 Hz / 47.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 43.0 Hz |
| Total Q (Qts) | 0.36 |
| Electrical Q (Qes) | 0.389 |
| Mechanical Q (Qms) | 4.8 |
| Equivalent Volume (Vas) | 17.5 Liters |
| Diaphragm Area (Sd) | 80.0 cm² |
| DC Resistance (Re) | 5.7 Ω |
| Efficiency Bandwidth Product (EBP) | 110.5 |
| Linear Excursion (Xmax) | 3.0 mm |
| Thermal Power (Pe) | 40.0 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 SB Acoustics SB15BAC30-8-COAX-R1?
Load Forge's calculated alignment puts SB Acoustics SB15BAC30-8-COAX-R1 in a 14.0 liter vented enclosure tuned to 45.3 Hz, reaching an F3 cutoff of approximately 44.6 Hz.
Can SB Acoustics SB15BAC30-8-COAX-R1 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 6.1 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 83.1 Hz.
What port dimensions should be used for SB Acoustics SB15BAC30-8-COAX-R1 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 16.9 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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Not sure if Data Sheet 5in SB15BAC30-8-COAX-R1 (Preliminary Data).cdr fits your physical space?
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