Rockville PUNISHER 15D2
Best box: 28.2 L sealed · Fc 49.8 Hz · F3 53.8 Hz
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Comparable 15.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Rockville PUNISHER 15D2 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
- Straight vent would be 269.9 cm long: not physically buildable as a simple tube. Use a passive radiator, a folded slot port or model a 3D folded duct in Load Forge Studio.
Textbook Bass Reflex — not recommended
PORT NOT BUILDABLE| Net Box Volume (Vb) | 64.5 Liters |
| Tuning Frequency (Fb) | 27.5 Hz |
| F3 (-3 dB Cutoff) | 27.2 Hz |
| F6 / F10 Extension | 24.0 Hz / 21.1 Hz |
| Port Inner Diameter | Ø 24.4 cm |
| Port Physical Length | 269.9 cm |
| First Pipe Resonance | 64.0 Hz |
| Estimated MOL @ F3 | 121.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 28.2 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 49.8 Hz |
| F3 (-3 dB Cutoff) | 53.8 Hz |
| F6 / F10 Extension | 40.0 Hz / 29.9 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 29.4 Hz |
| Total Q (Qts) | 0.412 |
| Electrical Q (Qes) | 0.484 |
| Mechanical Q (Qms) | 2.78 |
| Equivalent Volume (Vas) | 54.8 Liters |
| Diaphragm Area (Sd) | 800.4 cm² |
| DC Resistance (Re) | 4.0 Ω |
| Efficiency Bandwidth Product (EBP) | 60.8 |
| Linear Excursion (Xmax) | 58.0 mm |
| Thermal Power (Pe) | 6000.0 W |
| Nominal Diameter | 15.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Rockville PUNISHER 15D2?
A simple ported box is not recommended for Rockville PUNISHER 15D2: the textbook alignment (64.5 liters tuned to 27.5 Hz) needs a 269.9 cm port, and no nearby retune stays buildable without a bass hump. A sealed box, a passive radiator or a folded duct is the practical choice.
Can Rockville PUNISHER 15D2 be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 28.2 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 53.8 Hz.
What port dimensions should be used for Rockville PUNISHER 15D2 to avoid port chuffing?
A straight 24.4 cm port would need 269.9 cm of length, which does not fit a practical cabinet. Use a passive radiator or a folded/3D duct instead of a straight tube.
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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