• F7
  • F7
First Watt

pre-owned F7

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The 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.
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