First Watt
pre-owned F7
InquireThe F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET topology with fewer parts than any First Watt amplifier to date and incorporating a very interesting balance of very low negative voltage feedback and a little bit of positive current feedback to give an astonishing measure of control over reactive loudspeaker loads.
| Output Specifications | |
|---|---|
| Output power | 20Wpc into 8 ohms (1% THD at 1kHz); 30Wpc into 4 ohms (2% THD at 1kHz) |
| Frequency response | –3dB at 100kHz |
| Total harmonic distortion (THD) | 0.05% (1W) |
| Damping factor | 100 |
| Class A envelope | 50W peak at 4 ohms |
| Input Specifications | |
|---|---|
| Input impedance | 10k ohms |
| Gain | 14dB |
| Input sensitivity | 0.57V (1W); 2.53V (max output) |
| Noise Specifications | |
|---|---|
| Noise | 100µV unweighted, 20Hz–20kHz |
| General Specifications | |
|---|---|
| Dimensions | 17″ x 5.5″ x 15″ |
| Weight | 26 lbs. |