Audio System R 10 FA EVO
Best box: 15.8 L bass reflex tuned to 32.3 Hz · F3 36.5 Hz
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Comparable 10.0" Drivers
Drivers with similar piston area, resonance and Qts — useful alternatives when the Audio System R 10 FA EVO 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
- 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 (75.0 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) | 15.8 Liters |
| Tuning Frequency (Fb) | 32.3 Hz |
| F3 (-3 dB Cutoff) | 36.5 Hz |
| F6 / F10 Extension | 30.7 Hz / 25.5 Hz |
| Port Inner Diameter ESTIMATED | Ø 7.5 cm |
| Port Physical Length | 75.0 cm |
| First Pipe Resonance | 229.0 Hz |
Sealed (Acoustic Suspension) — compromise
SUITS INFINITE / OPEN BAFFLEWith Qts 0.65 a Butterworth (Qtc 0.707) box would be many times Vas. A box equal to Vas reaches Qtc 0.919; for a flat response this driver is better used on an infinite (IB) or open baffle.
| Net Box Volume (Vb) | 19.8 Liters |
| System Q (Qtc) | 0.919 (above Butterworth) |
| System Resonance (Fc) | 53.7 Hz |
| F3 (-3 dB Cutoff) | 42.7 Hz |
| F6 / F10 Extension | 32.8 Hz / 25.1 Hz |
| Air Spring Linearity | High (Zero port compression) |
Thiele/Small Parameters
| Resonance (Fs) | 38.0 Hz |
| Total Q (Qts) | 0.65 |
| Electrical Q (Qes) | 0.712 |
| Mechanical Q (Qms) | 7.47 |
| Equivalent Volume (Vas) | 19.8 Liters |
| Diaphragm Area (Sd) | 330.0 cm² |
| DC Resistance (Re) | 3.3 Ω |
| Efficiency Bandwidth Product (EBP) | 53.4 |
| Linear Excursion (Xmax) | N/A mm |
| Thermal Power (Pe) | N/A W |
| Nominal Diameter | 10.0" |
| Catalog Source | Load Forge catalog (manufacturer datasheets and retailer listings) |
Frequently Asked Questions
What is the recommended ported (bass reflex) box volume for Audio System R 10 FA EVO?
Load Forge's calculated alignment puts Audio System R 10 FA EVO in a 15.8 liter vented enclosure tuned to 32.3 Hz, reaching an F3 cutoff of approximately 36.5 Hz.
Can Audio System R 10 FA EVO be used in a sealed box?
Yes. In a sealed (acoustic suspension) enclosure of 19.8 liters with a Qtc of 0.919 (above Butterworth), the system exhibits an F3 of 42.7 Hz.
What port dimensions should be used for Audio System R 10 FA EVO to avoid port chuffing?
Xmax is not published for Audio System R 10 FA EVO, so the port is an empirical estimate: a 7.5 cm diameter with a length of 75.0 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.
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