Acr Speaker 848-curve
Best box: 103.6 L bass reflex tuned to 22.4 Hz · F3 28.9 Hz
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Comparable 8.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Acr Speaker 848-curve does not fit your target box volume or tuning. Each entry links to its full enclosure design and Thiele/Small parameters.
Recommended Bass Reflex (Vented)
PORT BUILDABLE| Net Box Volume (Vb) | 103.6 Liters |
| Tuning Frequency (Fb) | 22.4 Hz |
| F3 (-3 dB Cutoff) | 28.9 Hz |
| F6 / F10 Extension | 20.7 Hz / 17.1 Hz |
| Port Inner Diameter | Ø 5.0 cm |
| Port Physical Length | 7.7 cm |
| First Pipe Resonance | 2220.0 Hz |
| Estimated MOL @ F3 | 98.7 dB SPL |
Recommended Sealed (Acoustic Suspension)
MAX TRANSIENT DAMPING| Net Box Volume (Vb) | 177.9 Liters |
| System Q (Qtc) | 0.707 (Butterworth) |
| System Resonance (Fc) | 36.4 Hz |
| F3 (-3 dB Cutoff) | 37.2 Hz |
| F6 / F10 Extension | 28.2 Hz / 21.4 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 32.0 Hz |
| Total Q (Qts) | 0.6 |
| Electrical Q (Qes) | 0.76 |
| Mechanical Q (Qms) | 2.85 |
| Equivalent Volume (Vas) | 69.1 Liters |
| Diaphragm Area (Sd) | 216.4 cm² |
| DC Resistance (Re) | 5.0 Ω |
| Efficiency Bandwidth Product (EBP) | 42.1 |
| Linear Excursion (Xmax) | 5.3 mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 8.0" |
| 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 848-curve?
Load Forge's calculated alignment puts Acr Speaker 848-curve in a 103.6 liter vented enclosure tuned to 22.4 Hz, reaching an F3 cutoff of approximately 28.9 Hz.
Can Acr Speaker 848-curve be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 177.9 liters with a Qtc of 0.707 (Butterworth), the system exhibits an F3 of 37.2 Hz.
What port dimensions should be used for Acr Speaker 848-curve to avoid port chuffing?
Sized from cone displacement (Sd × Xmax), a minimum port diameter of 5.0 cm with a length of 7.7 cm is suggested; check the port air velocity at your drive level in the Load Forge Studio.
Shareable Acoustic Card for Forums & Social Media
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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