Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC)
Best box: 449.8 L bass reflex tuned to 26.5 Hz · F3 25.0 Hz
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Comparable 18.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC) 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
- Large enclosure volume (449.8 L) requires extensive internal matrix bracing to prevent panel resonance.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 449.8 Liters |
| Tuning Frequency (Fb) | 26.5 Hz |
| F3 (-3 dB Cutoff) | 25.0 Hz |
| F6 / F10 Extension | 22.5 Hz / 19.9 Hz |
| Port Inner Diameter | Ø 12.5 cm |
| Port Physical Length | 2.7 cm |
| First Pipe Resonance | 6352.0 Hz |
| Estimated MOL @ F3 | 119.9 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 195.6 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 46.1 Hz |
| F3 (-3 dB Cutoff) | 46.4 Hz |
| F6 / F10 Extension | 34.9 Hz / 26.3 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 27.0 Hz |
| Total Q (Qts) | 0.39 |
| Electrical Q (Qes) | 0.405 |
| Mechanical Q (Qms) | 10.34 |
| Equivalent Volume (Vas) | 447.3 Liters |
| Diaphragm Area (Sd) | 1269.2 cm² |
| DC Resistance (Re) | 5.6 Ω |
| Efficiency Bandwidth Product (EBP) | 66.6 |
| Linear Excursion (Xmax) | 9.2 mm |
| Thermal Power (Pe) | 700.0 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 Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC)?
Load Forge's calculated alignment puts Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC) in a 449.8 liter vented enclosure tuned to 26.5 Hz, reaching an F3 cutoff of approximately 25.0 Hz.
Can Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC) be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 195.6 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 46.4 Hz.
What port dimensions should be used for Acr Speaker 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC) to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 12.5 cm with a length of 2.7 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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Not sure if 3MN0676-00 (451006-Mk1 DESIBEL GENERAL SPEC) fits your physical space?
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