DS18 PRO-FR6NEO
Best box: 3.3 L bass reflex tuned to 110.0 Hz · F3 242.8 Hz
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Comparable 6.5" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the DS18 PRO-FR6NEO 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
- The textbook alignment (2.2 L at 183.3 Hz) would need a 24.7 cm port; the recommendation is retuned to 3.3 L at 110.0 Hz so the port can be built.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 3.3 Liters |
| Tuning Frequency (Fb) | 110.0 Hz |
| F3 (-3 dB Cutoff) | 242.8 Hz |
| F6 / F10 Extension | 131.5 Hz / 97.1 Hz |
| Port Inner Diameter | Ø 7.5 cm |
| Port Physical Length | 27.8 cm |
| First Pipe Resonance | 619.0 Hz |
| Estimated MOL @ F3 | 117.3 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 1.0 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 327.6 Hz |
| F3 (-3 dB Cutoff) | 320.5 Hz |
| F6 / F10 Extension | 244.8 Hz / 185.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 151.6 Hz |
| Total Q (Qts) | 0.309 |
| Electrical Q (Qes) | 0.32 |
| Mechanical Q (Qms) | 9.14 |
| Equivalent Volume (Vas) | 4.3 Liters |
| Diaphragm Area (Sd) | 137.0 cm² |
| DC Resistance (Re) | 3.2 Ω |
| Efficiency Bandwidth Product (EBP) | 474.1 |
| Linear Excursion (Xmax) | 6.8 mm |
| Thermal Power (Pe) | 225.0 W |
| Nominal Diameter | 6.5" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for DS18 PRO-FR6NEO?
Load Forge's calculated alignment puts DS18 PRO-FR6NEO in a 3.3 liter vented enclosure tuned to 110.0 Hz, reaching an F3 cutoff of approximately 242.8 Hz.
Can DS18 PRO-FR6NEO be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 1.0 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 320.5 Hz.
What port dimensions should be used for DS18 PRO-FR6NEO to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 7.5 cm with a length of 27.8 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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