SEAS H1659-08 U22REX/P-SL
Best box: 44.3 L bass reflex tuned to 37.1 Hz · F3 42.6 Hz
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Comparable 8.7" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the SEAS H1659-08 U22REX/P-SL does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 44.3 Liters |
| Tuning Frequency (Fb) | 37.1 Hz |
| F3 (-3 dB Cutoff) | 42.6 Hz |
| F6 / F10 Extension | 35.5 Hz / 30.5 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 6.1 cm |
| First Pipe Resonance | 2830.0 Hz |
| Estimated MOL @ F3 | 106.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 20.8 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 67.5 Hz |
| F3 (-3 dB Cutoff) | 79.3 Hz |
| F6 / F10 Extension | 57.9 Hz / 42.6 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 29.0 Hz |
| Total Q (Qts) | 0.29 |
| Electrical Q (Qes) | 0.359 |
| Mechanical Q (Qms) | 1.5 |
| Equivalent Volume (Vas) | 103.0 Liters |
| Diaphragm Area (Sd) | 220.0 cm² |
| DC Resistance (Re) | 6.0 Ω |
| Efficiency Bandwidth Product (EBP) | 80.7 |
| Linear Excursion (Xmax) | 4.0 mm |
| Thermal Power (Pe) | 250.0 W |
| Nominal Diameter | 8.7" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for SEAS H1659-08 U22REX/P-SL?
Load Forge's calculated alignment puts SEAS H1659-08 U22REX/P-SL in a 44.3 liter vented enclosure tuned to 37.1 Hz, reaching an F3 cutoff of approximately 42.6 Hz.
Can SEAS H1659-08 U22REX/P-SL be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 20.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 79.3 Hz.
What port dimensions should be used for SEAS H1659-08 U22REX/P-SL to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 6.1 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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