Scan-Speak 5F/8422T01
Best box: 1.5 L bass reflex tuned to 79.0 Hz · F3 70.8 Hz
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Comparable 2.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Scan-Speak 5F/8422T01 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 (59.3 cm) exceeds a straight internal run; use an elbow bend, slotted vent or 3D folded duct to fit the enclosure.
- Limited linear excursion (Xmax: 2.0 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Recommended Bass Reflex (Vented)
PORT NEEDS ELBOW / 3D| Net Box Volume (Vb) | 1.5 Liters |
| Tuning Frequency (Fb) | 79.0 Hz |
| F3 (-3 dB Cutoff) | 70.8 Hz |
| F6 / F10 Extension | 65.5 Hz / 59.8 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 59.3 cm |
| First Pipe Resonance | 290.0 Hz |
| Estimated MOL @ F3 | 86.1 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 1.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 106.9 Hz |
| F3 (-3 dB Cutoff) | 107.5 Hz |
| F6 / F10 Extension | 81.0 Hz / 61.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 93.0 Hz |
| Total Q (Qts) | 0.61 |
| Electrical Q (Qes) | 0.692 |
| Mechanical Q (Qms) | 5.17 |
| Equivalent Volume (Vas) | 0.6 Liters |
| Diaphragm Area (Sd) | 15.2 cm² |
| DC Resistance (Re) | 6.0 Ω |
| Efficiency Bandwidth Product (EBP) | 134.5 |
| Linear Excursion (Xmax) | 2.0 mm |
| Thermal Power (Pe) | 10.0 W |
| Nominal Diameter | 2.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Scan-Speak 5F/8422T01?
Load Forge's calculated alignment puts Scan-Speak 5F/8422T01 in a 1.5 liter vented enclosure tuned to 79.0 Hz, reaching an F3 cutoff of approximately 70.8 Hz.
Can Scan-Speak 5F/8422T01 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 1.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 107.5 Hz.
What port dimensions should be used for Scan-Speak 5F/8422T01 to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 59.3 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
Embed this design card on DIYAudio, AVSForum, Reddit, or Facebook. It shows the calculated F3, MOL (when the power rating is published) and box parameters.
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