SB Acoustics SW26DAC76-3-DV
Best box: 9.2 L sealed · Fc 48.9 Hz · F3 41.3 Hz
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Comparable 9.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SB Acoustics SW26DAC76-3-DV 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
- 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.
- Straight vent would be 176.1 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 19.3 Liters |
| Tuning Frequency (Fb) | 25.8 Hz |
| F3 (-3 dB Cutoff) | 31.6 Hz |
| F6 / F10 Extension | 27.0 Hz / 22.4 Hz |
| Port Inner Diameter ESTIMATED | Ø 10.0 cm |
| Port Physical Length | 176.1 cm |
| First Pipe Resonance | 98.0 Hz |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 9.2 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 48.9 Hz |
| F3 (-3 dB Cutoff) | 41.3 Hz |
| F6 / F10 Extension | 34.4 Hz / 27.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 19.5 Hz |
| Total Q (Qts) | 0.28 |
| Electrical Q (Qes) | 0.294 |
| Mechanical Q (Qms) | 5.96 |
| Equivalent Volume (Vas) | 49.7 Liters |
| Diaphragm Area (Sd) | 312.0 cm² |
| DC Resistance (Re) | 2.0 Ω |
| Efficiency Bandwidth Product (EBP) | 66.4 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 9.5" |
| 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 SW26DAC76-3-DV?
A simple ported box is not recommended for SB Acoustics SW26DAC76-3-DV: the textbook alignment (19.3 liters tuned to 25.8 Hz) needs a 176.1 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can SB Acoustics SW26DAC76-3-DV be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 9.2 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 41.3 Hz.
What port dimensions should be used for SB Acoustics SW26DAC76-3-DV to avoid port chuffing?
A straight 10.0 cm port would need 176.1 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
Shareable Acoustic Card for Forums & Social Media
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