Atohm LD230CR08M
Best box: 17.9 L bass reflex tuned to 26.0 Hz · F3 27.0 Hz
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Comparable 9.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Atohm LD230CR08M 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 (85.1 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) | 17.9 Liters |
| Tuning Frequency (Fb) | 26.0 Hz |
| F3 (-3 dB Cutoff) | 27.0 Hz |
| F6 / F10 Extension | 23.4 Hz / 20.2 Hz |
| Port Inner Diameter | Ø 6.8 cm |
| Port Physical Length | 85.1 cm |
| First Pipe Resonance | 202.0 Hz |
| Estimated MOL @ F3 | 103.2 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 8.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 48.5 Hz |
| F3 (-3 dB Cutoff) | 46.1 Hz |
| F6 / F10 Extension | 35.8 Hz / 27.5 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 22.8 Hz |
| Total Q (Qts) | 0.33 |
| Electrical Q (Qes) | 0.342 |
| Mechanical Q (Qms) | 9.6 |
| Equivalent Volume (Vas) | 28.8 Liters |
| Diaphragm Area (Sd) | 255.0 cm² |
| DC Resistance (Re) | 6.1 Ω |
| Efficiency Bandwidth Product (EBP) | 66.7 |
| Linear Excursion (Xmax) | 10.0 mm |
| Thermal Power (Pe) | 300.0 W |
| Nominal Diameter | 9.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Atohm LD230CR08M?
Load Forge's calculated alignment puts Atohm LD230CR08M in a 17.9 liter vented enclosure tuned to 26.0 Hz, reaching an F3 cutoff of approximately 27.0 Hz.
Can Atohm LD230CR08M be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 8.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 46.1 Hz.
What port dimensions should be used for Atohm LD230CR08M to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 6.8 cm with a length of 85.1 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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