CT Sounds TROPO-6-5 D2
6.5″ subwoofer · dual 2 Ω · 200 W RMS
Fs 57.5 HzQts 0.64Vas 0.13 ft³Xmax 0.28″
The published specs don’t add up:
- The spec sheet's Qts 0.71 doesn't match its Qes and Qms (they give 0.64).
Recommended box
For a sedan, one sub, 200 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 | 0.21 ft³ (6 L) |
|---|---|
| Qtc | 0.81 |
| Fc | 73 Hz |
| F3 (−3 dB, no cabin gain) | 67 Hz |
| Example box (outside) | 9 1/16″ × 9 1/16″ × 8 3/16″ |
Ported
| Net volume | 0.53 ft³ (15 L) |
|---|---|
| Tuning (Fb) | 47 Hz |
| Port | round port Ø2 1/2″, 9 9/16″ long |
| Port velocity at 200 W | 142 ft/s |
| F3 (−3 dB, no cabin gain) | 40 Hz |
| Example box (outside) | 14 5/8″ × 15 3/4″ × 6 11/16″ |
Thiele/Small parameters
| Fs | 57.5 Hz |
|---|---|
| Qts | 0.64 |
| Qes | 0.712 |
| Qms | 6.04 |
| Vas | 0.13 ft³ |
| Re (one coil) | 2.16 Ω |
| Sd | 22.2 in² |
| Xmax | 0.28″ |
| Vd | 6.1 in³ calc. |
| Mms | 62 g calc. |
| BL | 8.2 T·m calc. |
| EBP | 81 — sealed or ported calc. |
| Sensitivity, 1 W / 1 m | 81.8 dB calc. |
General
| Size | 6.5″ |
|---|---|
| Voice coils | dual 2 Ω |
| RMS power | 200 W |
Mounting dimensions
| Cutout diameter | 5 13/16″ |
|---|---|
| Mounting depth | 4 1/4″ |
| Overall diameter | 6 15/16″ |
“≈” 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 D2 6.5″ · dual 2 Ω
- CT Sounds MESO-6-5 D4 6.5″ · dual 4 Ω
- CT Sounds TROPO-6-5 D4 6.5″ · dual 4 Ω