CT Sounds MESO-6-5 D2
6.5″ subwoofer · dual 2 Ω · 400 W RMS
Fs 56.3 HzQts 0.69Vas 0.05 ft³Xmax 0.31″
The published specs don’t add up:
- Fs, Vas and Sd don't match the moving mass of 75.6 g (they give 141 g) — one of the spec sheet values is probably wrong.
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 | 0.19 ft³ (5.5 L) |
|---|---|
| Qtc | 0.78 |
| Fc | 63 Hz |
| F3 (−3 dB, no cabin gain) | 59 Hz |
| Example box (outside) | 9 1/16″ × 9 1/16″ × 7 11/16″ |
Ported
| Net volume | 0.39 ft³ (11 L) |
|---|---|
| Tuning (Fb) | 31 Hz |
| Port | slot 1 15/16 × 14 5/16″, 197 5/8″ long |
| Port velocity at 400 W | 25 ft/s |
| F3 (−3 dB, no cabin gain) | 28 Hz |
| Example box (outside) | 31 1/2″ × 15 3/4″ × 17 3/16″ |
The volume and tuning are the recommendation, but the port doesn’t fit this example box. Size the box and port in the designer.
Open ported box in designerThiele/Small parameters
| Fs | 56.3 Hz |
|---|---|
| Qts | 0.69 |
| Qes | 0.78 |
| Qms | 6.22 |
| Vas | 0.05 ft³ |
| Re (one coil) | 2.04 Ω |
| Sd | 20.6 in² |
| Xmax | 0.31″ |
| Vd | 6.5 in³ calc. |
| Mms | 141 g calc. |
| BL | 11.4 T·m calc. |
| EBP | 72 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 77.1 dB calc. |
General
| Size | 6.5″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 400 W |
Mounting dimensions
| Cutout diameter | 5 7/8″ |
|---|---|
| Mounting depth | 5 1/16″ |
| Overall diameter | 7 3/16″ |
“≈” 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.
Data sources
Other CT Sounds 6.5″ models
- CT Sounds MESO-6-5 D4 6.5″ · dual 4 Ω
- CT Sounds TROPO-6-5 D2 6.5″ · dual 2 Ω
- CT Sounds TROPO-6-5 D4 6.5″ · dual 4 Ω