Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 Ohm
Best box: 5.4 L bass reflex tuned to 44.9 Hz · F3 43.8 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 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
- The textbook alignment (2.7 L at 40.8 Hz) would need a 237.3 cm port; the recommendation is retuned to 5.4 L at 44.9 Hz so the port can be built.
- Port length (95.1 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 5.4 Liters |
| Tuning Frequency (Fb) | 44.9 Hz |
| F3 (-3 dB Cutoff) | 43.8 Hz |
| F6 / F10 Extension | 38.1 Hz / 33.5 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 95.1 cm |
| First Pipe Resonance | 181.0 Hz |
| Estimated MOL @ F3 | 107.4 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.63 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.891; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 3.4 Liters |
| System Q (Qtc) | 0.891 (above Butterworth) |
| System Resonance (Fc) | 67.9 Hz |
| F3 (-3 dB Cutoff) | 60.0 Hz |
| F6 / F10 Extension | 48.4 Hz / 38.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 48.0 Hz |
| Total Q (Qts) | 0.63 |
| Electrical Q (Qes) | 0.751 |
| Mechanical Q (Qms) | 3.92 |
| Equivalent Volume (Vas) | 3.4 Liters |
| Diaphragm Area (Sd) | 220.0 cm² |
| DC Resistance (Re) | 6.4 Ω |
| Efficiency Bandwidth Product (EBP) | 63.9 |
| Linear Excursion (Xmax) | 10.0 mm |
| Thermal Power (Pe) | 700.0 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 Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 Ohm?
Load Forge's calculated alignment puts Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 Ohm in a 5.4 liter vented enclosure tuned to 44.9 Hz, reaching an F3 cutoff of approximately 43.8 Hz.
Can Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 Ohm be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 3.4 liters with a Qtc of 0.891 (above Butterworth), the system exhibits an F3 of 60.0 Hz.
What port dimensions should be used for Discontinued HIPPOXL84V2 - 8" 700 Watts RMS Dual 4 Ohm to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 95.1 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
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