Celestion CN1025B
Best box: 17.9 L bass reflex tuned to 82.9 Hz · F3 80.0 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Celestion CN1025B 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
- Limited linear excursion (Xmax: 2.1 mm); set a high-pass subsonic filter at 25–30 Hz when driven with high power.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 17.9 Liters |
| Tuning Frequency (Fb) | 82.9 Hz |
| F3 (-3 dB Cutoff) | 80.0 Hz |
| F6 / F10 Extension | 71.3 Hz / 62.9 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 4.0 cm |
| First Pipe Resonance | 4314.0 Hz |
| Estimated MOL @ F3 | 116.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 7.8 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 146.9 Hz |
| F3 (-3 dB Cutoff) | 146.5 Hz |
| F6 / F10 Extension | 111.0 Hz / 83.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 79.5 Hz |
| Total Q (Qts) | 0.364 |
| Electrical Q (Qes) | 0.41 |
| Mechanical Q (Qms) | 3.27 |
| Equivalent Volume (Vas) | 21.6 Liters |
| Diaphragm Area (Sd) | 346.4 cm² |
| DC Resistance (Re) | 10.76 Ω |
| Efficiency Bandwidth Product (EBP) | 194.1 |
| Linear Excursion (Xmax) | 2.1 mm |
| Thermal Power (Pe) | 250.0 W |
| Nominal Diameter | 10.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Celestion CN1025B?
Load Forge's calculated alignment puts Celestion CN1025B in a 17.9 liter vented enclosure tuned to 82.9 Hz, reaching an F3 cutoff of approximately 80.0 Hz.
Can Celestion CN1025B be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 7.8 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 146.5 Hz.
What port dimensions should be used for Celestion CN1025B to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 4.0 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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