DB Drive WDX18G5R.2
Best box: 79.6 L bass reflex tuned to 32.6 Hz · F3 31.2 Hz
Open and tweak this box live ↗
Will it fit your requirements?
Check the DB Drive WDX18G5R.2 against your space and targets — instant, no sign-up.
Estimated retail 899.98 USD · Check price & availability ↗
Free, no sign-up to simulate · a free account saves your design
Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the DB Drive WDX18G5R.2 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 (79.6 L at 23.3 Hz) would need a 203.6 cm port; the recommendation is retuned to 79.6 L at 32.6 Hz so the port can be built.
- 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.
- Port length (97.0 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) | 79.6 Liters |
| Tuning Frequency (Fb) | 32.6 Hz |
| F3 (-3 dB Cutoff) | 31.2 Hz |
| F6 / F10 Extension | 28.1 Hz / 24.9 Hz |
| Port Inner Diameter ESTIMATED | Ø 20.0 cm |
| Port Physical Length | 97.0 cm |
| First Pipe Resonance | 177.0 Hz |
| Estimated MOL @ F3 | 121.3 dB SPL |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.64 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.905; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 99.5 Liters |
| System Q (Qtc) | 0.905 (above Butterworth) |
| System Resonance (Fc) | 38.7 Hz |
| F3 (-3 dB Cutoff) | 58.0 Hz |
| F6 / F10 Extension | 37.9 Hz / 25.7 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 27.4 Hz |
| Total Q (Qts) | 0.64 |
| Electrical Q (Qes) | 0.775 |
| Mechanical Q (Qms) | 3.68 |
| Equivalent Volume (Vas) | 99.5 Liters |
| Diaphragm Area (Sd) | 1210.0 cm² |
| DC Resistance (Re) | 2.0 Ω |
| Efficiency Bandwidth Product (EBP) | 35.4 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | 3000.0 W |
| Nominal Diameter | 18.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for DB Drive WDX18G5R.2?
Load Forge's calculated alignment puts DB Drive WDX18G5R.2 in a 79.6 liter vented enclosure tuned to 32.6 Hz, reaching an F3 cutoff of approximately 31.2 Hz.
Can DB Drive WDX18G5R.2 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 99.5 liters with a Qtc of 0.905 (above Butterworth), the system exhibits an F3 of 58.0 Hz.
What port dimensions should be used for DB Drive WDX18G5R.2 to avoid port chuffing?
Xmax is not published for DB Drive WDX18G5R.2, so the port is an empirical estimate: a 20.0 cm diameter with a length of 97.0 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.
Not sure if WDX18G5R.2 fits your physical space?
Don't force a driver into the wrong box. Use Bass Match to calculate which of 8,000+ catalog drivers delivers the highest SPL, lowest F3, and cleanest port air velocity for your exact trunk or room dimensions.
Run Bass Match for Your Space