GRADIENTE
45 models recorded, with the line-output transformer or tripler each was fitted with.
| Model | Parts |
|---|---|
| 14 C 5160 | HR 8239 |
| 14 C 5170 | HR 8239 |
| 20 C 5170 | HR 7357 |
| 2020 | HR 80083 |
| 2030 | HR 8300 |
| 2033 | HR 8300 |
| 335 COM PIP | HR 80030 |
| GT 1400 | HR 81006 |
| GT 1410 | HR 8239 |
| GT 1411 | HR 8239 |
| GT 1420 | HR 7484 HR 80054 |
| GT 1422 | HR 7484 |
| GT 2006 | HR 81006 |
| GT 2010 | HR 7357 HR 7535 |
| GT 2011 | HR 7357 HR 7535 |
| GT 2015 | HR 7357 HR 7535 |
| GT 2016 | HR 81006 |
| GT 202 | HR 80255 |
| GT 2020 | HR 7484 HR 80054 HR 80083 |
| GT 2022 | HR 7484 |
| GT 2025 | HR 7484 |
| GT 2030 | HR 8300 |
| GT 2033 | HR 8300 |
| GT 2035 | HR 8300 |
| GT 2825 | HR 80255 |
| GT 29 S | HR 80254 |
| GT 2925 | HR 80255 |
| GTV 142 | HR 7910 |
| HRM 29 PS | HR 8269 HR 80254 |
| HRM 29 S | HR 80254 |
| HRM 290 PS | HR 8268 |
| HRM 290 S | HR 8833 |
| HRM 2905 | HR 8833 |
| HRM 33 PS | HR 8269 |
| HRM 33 S | HR 80030 |
| HRM 330 S | HR 8268 |
| HRM 370 PS | HR 8268 |
| HTM 277 S | HR 80031 |
| HTM 291 | HR 80031 |
| HTM 299 S | HR 80031 |
| M 291 | HR 80031 |
| MHM 299 S | HR 80031 |
| SM 20 | HR 8300 |
| TV + VIDEO GTV 142 | HR 7910 |
| TV 2020 | HR 80083 |