| Mfr. Part No. | Description |
| TDP-1W | Frequency range Hz, 30~20K |
| TDP-2W | Frequency range Hz, 30~20K |
| TD-1 | Frequency range Hz, 30~20K |
| TD-1631 | Frequency range Hz, 50~20K |
| TD-2 | Frequency range Hz, 30~20K |
| TK-1 | Frequency range Hz, 50~10K |
| TK-10 | Frequency range Hz, 20~20K |
| TK-161 | Frequency range Hz, 30~30K |
| TK-2 | Frequency range Hz, 50~10K |
| TK-20 | Frequency range Hz, 20~20K |
| TK-171 | Frequency range Hz, 30~15K |