Hifonics HEW10D4S
Best box: 10.7 L sealed · Fc 70.7 Hz · F3 59.6 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Hifonics HEW10D4S 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
- Port length (65.2 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Textbook Bass Reflex — not recommended (5.3 dB bass hump)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 8.6 Liters |
| Tuning Frequency (Fb) | 42.5 Hz |
| F3 (-3 dB Cutoff) | 68.7 Hz |
| F6 / F10 Extension | 61.3 Hz / 51.7 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 65.2 cm |
| First Pipe Resonance | 264.0 Hz |
| Estimated MOL @ F3 | 113.5 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 1.56 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 2.206; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 10.7 Liters |
| System Q (Qtc) | 2.206 (above Butterworth: Qtc cannot fall below Qts (1.56)) |
| System Resonance (Fc) | 70.7 Hz |
| F3 (-3 dB Cutoff) | 59.6 Hz |
| F6 / F10 Extension | 53.1 Hz / 45.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 50.0 Hz |
| Total Q (Qts) | 1.56 |
| Electrical Q (Qes) | 1.93 |
| Mechanical Q (Qms) | 8.14 |
| Equivalent Volume (Vas) | 10.7 Liters |
| Diaphragm Area (Sd) | 206.1 cm² |
| DC Resistance (Re) | 7.13 Ω |
| Efficiency Bandwidth Product (EBP) | 25.9 |
| Linear Excursion (Xmax) | 8.2 mm |
| Thermal Power (Pe) | N/A 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 Hifonics HEW10D4S?
A simple ported box is not recommended for Hifonics HEW10D4S: the textbook alignment (8.6 liters tuned to 42.5 Hz) needs a 65.2 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 Hifonics HEW10D4S be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 10.7 liters with a Qtc of 2.206 (above Butterworth: Qtc cannot fall below Qts (1.56)), the system exhibits an F3 of 59.6 Hz.
What port dimensions should be used for Hifonics HEW10D4S to avoid port chuffing?
A straight 6.8 cm port would need 65.2 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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