Jensen C 12/100 RT
Best box: 71.3 L bass reflex tuned to 66.4 Hz · F3 60.9 Hz
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Comparable 12.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Jensen C 12/100 RT 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
- Xmax is not published, so the port size is an empirical estimate (area ≥ 12 in² per ft³ of net volume, minimum by driver size), not a displacement calculation. Check air velocity in Load Forge Studio.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 71.3 Liters |
| Tuning Frequency (Fb) | 66.4 Hz |
| F3 (-3 dB Cutoff) | 60.9 Hz |
| F6 / F10 Extension | 55.3 Hz / 49.6 Hz |
| Port Inner Diameter ESTIMATED | Ø 20.0 cm |
| Port Physical Length | 15.7 cm |
| First Pipe Resonance | 1099.0 Hz |
| Estimated MOL @ F3 | 115.0 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 32.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 111.5 Hz |
| F3 (-3 dB Cutoff) | 112.9 Hz |
| F6 / F10 Extension | 85.1 Hz / 64.2 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 77.0 Hz |
| Total Q (Qts) | 0.45 |
| Electrical Q (Qes) | 0.467 |
| Mechanical Q (Qms) | 12.41 |
| Equivalent Volume (Vas) | 47.0 Liters |
| Diaphragm Area (Sd) | 490.9 cm² |
| DC Resistance (Re) | 6.72 Ω |
| Efficiency Bandwidth Product (EBP) | 164.9 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 100.0 W |
| Nominal Diameter | 12.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Jensen C 12/100 RT?
Load Forge's calculated alignment puts Jensen C 12/100 RT in a 71.3 liter vented enclosure tuned to 66.4 Hz, reaching an F3 cutoff of approximately 60.9 Hz.
Can Jensen C 12/100 RT be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 32.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 112.9 Hz.
What port dimensions should be used for Jensen C 12/100 RT to avoid port chuffing?
Xmax is not published for Jensen C 12/100 RT, so the port is an empirical estimate: a 20.0 cm diameter with a length of 15.7 cm (area at least 12 in² per ft³ of net volume). Check the air velocity at your power level in 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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