Goldwood GW-215/8 15" OEM Woofer 8 Ohm
Best box: 366.4 L sealed · Fc 41.7 Hz · F3 33.9 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Goldwood GW-215/8 15" OEM Woofer 8 Ohm 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
- Large enclosure volume (293.1 L) requires extensive internal matrix bracing to prevent panel resonance.
- Limited linear excursion (Xmax: 3.5 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Textbook Bass Reflex — not recommended (9.5 dB bass hump)
PORT BUILDABLE| Net Box Volume (Vb) | 293.1 Liters |
| Tuning Frequency (Fb) | 25.1 Hz |
| F3 (-3 dB Cutoff) | 39.9 Hz |
| F6 / F10 Extension | 36.3 Hz / 31.3 Hz |
| Port Inner Diameter | Ø 10.0 cm |
| Port Physical Length | 5.6 cm |
| First Pipe Resonance | 3072.0 Hz |
| Estimated MOL @ F3 | 108.9 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 1.95 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 2.758; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 366.4 Liters |
| System Q (Qtc) | 2.758 (above Butterworth: Qtc cannot fall below Qts (1.95)) |
| System Resonance (Fc) | 41.7 Hz |
| F3 (-3 dB Cutoff) | 33.9 Hz |
| F6 / F10 Extension | 30.8 Hz / 26.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 29.5 Hz |
| Total Q (Qts) | 1.95 |
| Electrical Q (Qes) | 2.69 |
| Mechanical Q (Qms) | 7.09 |
| Equivalent Volume (Vas) | 366.4 Liters |
| Diaphragm Area (Sd) | 823.4 cm² |
| DC Resistance (Re) | 7.1 Ω |
| Efficiency Bandwidth Product (EBP) | 11.0 |
| Linear Excursion (Xmax) | 3.5 mm |
| Thermal Power (Pe) | 135.0 W |
| Nominal Diameter | 15.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Goldwood GW-215/8 15" OEM Woofer 8 Ohm?
A simple ported box is not recommended for Goldwood GW-215/8 15" OEM Woofer 8 Ohm: the textbook alignment (293.1 liters tuned to 25.1 Hz) needs a 5.6 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 Goldwood GW-215/8 15" OEM Woofer 8 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 366.4 liters with a Qtc of 2.758 (above Butterworth: Qtc cannot fall below Qts (1.95)), the system exhibits an F3 of 33.9 Hz.
What port dimensions should be used for Goldwood GW-215/8 15" OEM Woofer 8 Ohm to avoid port chuffing?
A straight 10.0 cm port would need 5.6 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
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