Mac Audio Maximus 2500 (DVC)
10″ subwoofer · dual 4 Ω · 400 W RMS
Fs 22 HzQts 0.40Vas 1.98 ft³
Recommended box
For a sedan, one sub, 400 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.
Sealed
| Net volume | 0.67 ft³ (19 L) |
|---|---|
| Qtc | 0.80 |
| Fc | 44 Hz |
| F3 (−3 dB, no cabin gain) | 42 Hz |
| Example box (outside) | 12 5/8″ × 12 5/8″ × 11 9/16″ |
Ported
| Net volume | 2.05 ft³ (58 L) |
|---|---|
| Tuning (Fb) | 25 Hz |
| Port | slot 1 9/16 × 14 5/16″, 43 3/16″ long |
| Port velocity at 400 W | 58 ft/s |
| F3 (−3 dB, no cabin gain) | 23 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 13″ |
Thiele/Small parameters
| Fs | 22 Hz |
|---|---|
| Qts | 0.40 |
| Qes | 0.429 |
| Qms | 6 |
| Vas | 1.98 ft³ |
| Re (one coil) | ≈ 3.4 Ω |
| Sd | ≈ 52.7 in² |
| Xmax | ≈ 0.39″ |
| EBP | 51 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 83.4 dB calc. |
General
| Size | 10″ |
|---|---|
| Voice coils | dual 4 Ω |
| RMS power | 400 W |
Mounting dimensions
| Cutout diameter | 9 7/16″ |
|---|---|
| Mounting depth | 5 7/8″ |
| Overall diameter | 10 11/16″ |
Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).
“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.