| # | Product | Highest Frequency |
|---|---|---|
| 151 | Wharfedale Diamond 12.2 | 20000 Hz |
| 151 | Wharfedale Diamond 12.1 | 20000 Hz |
| 151 | Singing Wood BT25 | 20000 Hz |
| 151 | Edifier R1380T | 20000 Hz |
| 151 | Edifier R1280DBs | 20000 Hz |
| 151 | Edifier MR4 | 20000 Hz |
| 151 | Wharfedale Crystal 4.1 | 20000 Hz |
| 151 | Edifier R980T 2.0 | 20000 Hz |
| 151 | Wharfedale Crystal 4.3 | 20000 Hz |
| 151 | Wharfedale Diamond Active A1 | 20000 Hz |
| 151 | Edifier R2000DB | 20000 Hz |
| 151 | Micca RB42 | 20000 Hz |
| 151 | Edifier P17 | 20000 Hz |
| 151 | Wharfedale Diamond 12.0 | 20000 Hz |
| 165 | Edifier R1280T | 18000 Hz |