| 1 | Suitable for loud speaker, teaching equipments and so on. | |
| 2 | I just bought an amplifier yesterday. | |
| 3 | We haven't any amplifiers in stock just at present; but they should come in any moment. | |
| 4 | Admission at the transistor, amplifiers, the widespread adoption of push-pull power amplifier circuit. | |
| 5 | I will blow one of my stereo speakers if I turn my 200-watt amplifier up to wide open? |